Wiki
Wiki

Research notes on every problem, and a library of the papers behind them. Built from the open erdos repository.

Updated

../


Purpose and standing. This page draws the connections from the author-recorded reconstructions in the Problem 1221 folder to the rest of the corpus. Each section names its exact target with the target's current assessment, states what the reconstructed mechanism gives when transported, with a proof where one is given here, states what it does not give and why, and names the next investigation with what each outcome would establish. Every new statement below is author-recorded, and no status or tier changes. The statements were independently reviewed as they stood on 2026-09-28T13:50:48Z by four focused reviews, one per section, graded in the connections grade, which passes all four and accepts eight corrections, since applied; it assigns no tier. The Target sentences on the standings of Problems 255 and 1221 differ from that reviewed subject. In the Problem 1221 section, the current explanation specifies lifted span arcs, including full turns, the empty-list convention in Proposition 1221.1, and the vacuous separation restriction when a list has only one distinct value. Its standing and outcome distinguish the reviewed conditional extension from the separate whole composition, which has no independent review. The statements of Propositions 1221.1--1221.2 and the conditional deduction 1221.3 retain their mathematical conclusions. The notation is the folder's: a sequence a=(a1,a2,…)a=(a_1,a_2,\ldots) on the circle T\mathbb T of circumference 11, the nn gaps cut by its first nn terms (of length 00 between coincident terms), the rr-spans, that is, the sums of rr cyclically consecutive gaps, with largest and smallest values Mnr(a)M_n^r(a) and mnr(a)m_n^r(a), and the 1949 constants

Λr=inf⁡alim sup⁡n→∞nMnr(a),λr=sup⁡alim inf⁡n→∞nmnr(a),μr=inf⁡alim sup⁡n→∞Mnr(a)mnr(a).\Lambda_r=\inf_a\limsup_{n\to\infty}nM_n^r(a),\qquad \lambda_r=\sup_a\liminf_{n\to\infty}nm_n^r(a),\qquad \mu_r=\inf_a\limsup_{n\to\infty}\frac{M_n^r(a)}{m_n^r(a)} .

For an arc II and a stage nn the counting error is Dn(I)=#{i≤n: ai∈I}−n∣I∣D_n(I)=\#\{i\le n:\ a_i\in I\}-n|I|, and Nn(I)=#{i≤n: ai∈I}N_n(I)=\#\{i\le n:\ a_i\in I\} counts indices, so coincident terms count with multiplicity.

Problem 255: the 1949 implication toward the discrepancy theorem

Target. Problem 255 asks whether every sequence z1,z2,…∈[0,1]z_1,z_2,\ldots\in[0,1] has an interval II with lim sup⁡N∣DN(I)∣=∞\limsup_N|D_N(I)|=\infty. Its page records the problem as solved, with the question proved, on three accepted claim pages for Schmidt's papers of 1968 and 1972 and Tijdeman--Wagner 1980, and its Progress section records the implication proved below; the held source Schmidt 1972, part VI shows that the anchors α\alpha for which Dn([0,α))D_n([0,\alpha)) stays bounded form a countable set, so all but countably many anchored intervals answer the question. The connection named in the folder index is the remark on p. 14 of the 1949 note, recorded on the conjecture page: the third part of the conjecture would imply van Aardenne-Ehrenfest's "just distributions" theorem of 1945, that no sequence has sup⁡α∣Dn([0,α))∣\sup_\alpha|D_n([0,\alpha))| bounded in nn.

What transports. The remark is a theorem, each of the three parts of the mean-normalized reading suffices, and the proof is four lines of the folder's span bookkeeping.

Proposition 255.1 (author-recorded). Let aa be a sequence on the circle, coincident terms allowed, and let KK be a number with ∣Dn(I)∣≤K|D_n(I)|\le K for every n≥1n\ge1 and every half-open arc II. Then for every r≥1r\ge1 and every n>rn>r,

nMnr(a) ≤ r+K−1,nmnr(a) ≥ r−K+1.nM_n^r(a)\ \le\ r+K-1,\qquad nm_n^r(a)\ \ge\ r-K+1 .

Consequently Λr−r≤Λr(a)−r≤K−1\Lambda_r-r\le\Lambda_r(a)-r\le K-1 and r−λr≤r−λr(a)≤K−1r-\lambda_r\le r-\lambda_r(a)\le K-1 for every rr, and for r≥Kr\ge K

r(μr−1) ≤ r(μr(a)−1) ≤ 2(K−1) rr−K+1 →r→∞ 2(K−1),r(\mu_r-1)\ \le\ r\bigl(\mu_r(a)-1\bigr)\ \le\ \frac{2(K-1)\,r}{r-K+1} \ \xrightarrow[r\to\infty]{}\ 2(K-1),

so all three expressions of the mean-normalized conjecture stay bounded. Hence each part of the conjecture implies that no sequence has uniformly bounded counting error on arcs; a bound KK on the anchored intervals [0,α)[0,\alpha) gives the bound 2K2K on every arc and conversely, so this is the 1945 theorem in its original form.

Proof. The hypothesis passes from half-open arcs to open and closed arcs: for an open arc (p,q)(p,q) of positive length the half-open arcs (p,q−ε](p,q-\varepsilon] contain the same terms of stage nn once ε\varepsilon is small, and their lengths tend to ∣(p,q)∣|(p,q)|; for a closed arc [p,q][p,q] the arcs (p−ε,q](p-\varepsilon,q] contain the same terms once ε\varepsilon is small. So ∣Dn(I)∣≤K|D_n(I)|\le K for arcs of every endpoint type, and the complement of an arc, which has counting error −Dn(I)-D_n(I), covers the wrapping arcs. (At n=1n=1 a short arc containing a1a_1 shows K≥1K\ge1.)

Fix r≥1r\ge1 and n>rn>r, list the first nn terms in cyclic order, coincident terms in order of index, and let JJ be an rr-span: the clockwise distance ∣J∣|J| from a term pp to the term qq that is rr places after pp. The open arc (p,q)(p,q) contains only terms strictly between pp and qq in the cyclic order, since a term at the position of pp or of qq is excluded, so Nn((p,q))≤r−1N_n((p,q))\le r-1; from Dn((p,q))≥−KD_n((p,q))\ge-K,

n∣J∣ ≤ Nn((p,q))+K ≤ r−1+K,n|J|\ \le\ N_n((p,q))+K\ \le\ r-1+K ,

trivially so when ∣J∣=0|J|=0. The closed arc [p,q][p,q] contains the r+1r+1 terms p,…,qp,\ldots,q, which are distinct terms because n>rn>r; from Dn([p,q])≤KD_n([p,q])\le K, r+1−n∣J∣≤Kr+1-n|J|\le K, that is, n∣J∣≥r+1−Kn|J|\ge r+1-K. The largest and the smallest span give the two displayed bounds. Letting n→∞n\to\infty gives Λr(a)≤r+K−1\Lambda_r(a)\le r+K-1 and λr(a)≥r−K+1\lambda_r(a)\ge r-K+1. For r≥Kr\ge K the lower bound makes every late span positive and

Mnr(a)mnr(a) ≤ r+K−1r−K+1=1+2(K−1)r−K+1,\frac{M_n^r(a)}{m_n^r(a)}\ \le\ \frac{r+K-1}{r-K+1}=1+\frac{2(K-1)}{r-K+1},

which gives the bound on r(μr(a)−1)r(\mu_r(a)-1); the universal constants obey Λr≤Λr(a)\Lambda_r\le\Lambda_r(a), λr≥λr(a)\lambda_r\ge\lambda_r(a), μr≤μr(a)\mu_r\le\mu_r(a). The last display tends to 2(K−1)2(K-1), so each expression is bounded in rr. Finally Dn((α,β])=Dn([0,β])−Dn([0,α])D_n((\alpha,\beta])=D_n([0,\beta])-D_n([0,\alpha]) up to the endpoint adjustments above, so anchored bounds give arc bounds with the factor 22, and anchored intervals are arcs. □\square

What it does not give.

  • Not the fixed interval of Problem 255. The arcs whose counting error the proof exploits are the spans of stage nn and move with nn; the conclusion is lim sup⁡nsup⁡I∣Dn(I)∣=∞\limsup_n\sup_I|D_n(I)|=\infty, the 1945 form. Problem 255 asks for one interval II with lim sup⁡n∣Dn(I)∣=∞\limsup_n|D_n(I)|=\infty, which is the content of Schmidt's 1968 paper (the bounded anchors form a null set) and of part VI (they are countable); no page of the folder bears on the passage from a moving arc to a fixed one.
  • No rate, in either direction. With a nondecreasing K(n)→∞K(n)\to\infty in place of KK the proof gives nMnr(a)≤r+K(n)−1nM_n^r(a)\le r+K(n)-1 and nmnr(a)≥r−K(n)+1nm_n^r(a)\ge r-K(n)+1, which bound nothing in the limit because K(n)→∞K(n)\to\infty: the constants Λr,λr,μr\Lambda_r,\lambda_r,\mu_r are limits in nn at fixed rr, so through Proposition 255.1 a growth rate of the discrepancy in nn neither follows from the conjecture nor feeds it. Coupling rr to a point count is exactly what Lemma 4.2 of the 2026 preprint adds; see the reverse edge.
  • Circular through the only claimed proof of the premise. The fixed-rr bounds, (5.7) of 1949 and Theorem 1.1 of the 2026 note, are bounded in rr and do not reach the premise; the growth is claimed only by Theorem 1.1 of the 2026 preprint, whose ratio part consumes a finite-list form of Schmidt's theorem, itself a quantitative strengthening of the 1945 theorem, and whose one-sided parts consume Halász's planar theorem. Deriving the 1945 theorem from that claim through Proposition 255.1 proves nothing new. A proof of any one part that avoids discrepancy lower bounds would give a new proof of the 1945 theorem; none is in the sources read.
  • Scope. The 2026 claim is stated over sequences of distinct points, so through Proposition 255.1 it would exclude only just-distributed sequences of distinct points; the extension to all sequences is the subject of the section on Problem 1221's own family below.

The reverse edge. A quantitative form of the 1945 theorem, the uniform statement that the conclusion of Problem 255 strengthens, is an input of the claimed resolution, not a consequence of it. Lemma 4.2 turns the short-interval counting bound of Proposition 3.1 into a list of ⌊S⌋\lfloor S\rfloor points all of whose prefixes have counting error at most BB, and the imported Theorem 4.1, the finite-prefix form HL≥116log⁡LH_L\ge\frac1{16}\log L that the source derives from Larcher's 2015 proof, supplies the contradiction; Lemma 7.2 does the same with Halász's planar L1L^1 theorem. The Problem 255 source held here, part VI of Schmidt's series, is a different theorem (countability of the bounded anchors) from the planar theorem of part VII (Acta Arith. 21 (1972), 45--50) that the Lemma 4.2 page names as the source of the qualitative finite-list bound. Neither part VII, nor Larcher 2015, nor Halász 1981 is held, so the corpus holds neither of the two inputs the reconstruction imports.

Next investigation. Acquire and file Larcher 2015 (J. Complexity 31, 474--485; arXiv:1407.2094) and Halász 1981, and check the two imported statements as used: the finite-list bound with the constant 1/161/16 for every list of length ⌊ah⌋\lfloor a^h\rfloor, and the unnormalized planar L1L^1 bound cHlog⁡Mc_H\sqrt{\log M}. A positive outcome closes the two import gaps of the reconstruction of the 2026 preprint and gives the Problem 255 library a hook to the theorem actually consumed; a negative one (for instance, Larcher's Section 3 bounding only infinitely many prefixes of an infinite sequence) leaves the growth statement of the ratio part standing through part VII with an unspecified constant and removes the warrant for the coefficient 1/1001/100. Neither outcome changes Problem 255.

Outcome. Transfers as an implication (Proposition 255.1); it yields nothing new for Problem 255, which is proved and stronger, and the mathematical dependency runs the other way.

Problem 480: the clustering constant and the Section 4 count

Target. Problem 480 asks whether every sequence x1,x2,…∈[0,1]x_1,x_2,\ldots\in[0,1] satisfies

C(xˉ)=inf⁡nlim inf⁡m→∞n ∣xm+n−xm∣ ≤ 5−1/2.C(\bar x)=\inf_n\liminf_{m\to\infty}n\,|x_{m+n}-x_m|\ \le\ 5^{-1/2} .

Its Current assessment records the status proved: Theorem 1 of Chung and Graham (1984) gives C(xˉ)≤α=0.39441967…C(\bar x)\le\alpha=0.39441967\ldots for every sequence, their Theorem 2 shows that α\alpha is best possible, and erdosproblems.com showed PROVED (LEAN). The folder index names two links. First, the chapter's introduction attributes to the 1949 note the bound 1/log⁡41/\log4 for its measure

ω(xˉ)=lim inf⁡n→∞ nmin⁡1≤i<j≤n∣xi−xj∣,\omega(\bar x)=\liminf_{n\to\infty}\ n\min_{1\le i<j\le n}|x_i-x_j| ,

which is the interval analog of λ1(a)=lim inf⁡nnmn1(a)\lambda_1(a)=\liminf_nnm_n^1(a) on the circle; the card of the note points at Proposition 480.1 below for the passage from the circle to the interval. Second, the index says the Chung--Graham proof descends from the Section 4 count.

What transports. The Section 4 count, rerun on the interval, gives the chapter's display (1).

Proposition 480.1 (author-recorded). For every sequence x1,x2,…∈[0,1]x_1,x_2,\ldots\in[0,1] and every n≥1n\ge1 there is an integer kk with n<k≤2nn<k\le2n such that

k gk ≤ τn′:=(2∑k=n+12n1k−1n+1)−1,gk=min⁡1≤i<j≤k∣xi−xj∣.k\,g_k\ \le\ \tau'_n:=\Bigl(2\sum_{k=n+1}^{2n}\frac1k-\frac1{n+1}\Bigr)^{-1}, \qquad g_k=\min_{1\le i<j\le k}|x_i-x_j| .

Since τn′→1/log⁡4\tau'_n\to1/\log4, every sequence in [0,1][0,1] has ω(xˉ)≤1/log⁡4\omega(\bar x)\le1/\log4, and the sequence xk={log⁡2(2k−1)}x_k=\{\log_2(2k-1)\} attains the bound.

Proof. Fix nn, put N=2nN=2n, and list x1,…,xNx_1,\ldots,x_N in increasing order as y1≤y2≤⋯≤yNy_1\le y_2\le\cdots\le y_N with yi=xkiy_i=x_{k_i}, (k1,…,kN)(k_1,\ldots,k_N) a permutation of (1,…,N)(1,\ldots,N) (equal values in either order). For 1≤i≤N−11\le i\le N-1 put ki∗=max⁡(ki,ki+1,n+1)k_i^*=\max(k_i,k_{i+1},n+1), so n<ki∗≤2nn<k_i^*\le2n. The terms xkix_{k_i} and xki+1x_{k_{i+1}} are two of the first ki∗k_i^* terms, so yi+1−yi≥gki∗y_{i+1}-y_i\ge g_{k_i^*}. Suppose that ϱ>0\varrho>0 satisfies kgk>ϱkg_k>\varrho for every kk with n<k≤2nn<k\le2n. Then yi+1−yi>ϱ/ki∗y_{i+1}-y_i>\varrho/k_i^* for every ii, and summing the N−1N-1 consecutive differences,

1 ≥ yN−y1 > ϱ∑i=1N−11ki∗.1\ \ge\ y_N-y_1\ >\ \varrho\sum_{i=1}^{N-1}\frac1{k_i^*} .

For n+1<k≤Nn+1<k\le N the equality ki∗=kk_i^*=k forces k∈{ki,ki+1}k\in\{k_i,k_{i+1}\}, and k=kjk=k_j for exactly one jj, which occurs in the windows i=j−1i=j-1 and i=ji=j only; so kk occurs εk≤2\varepsilon_k\le2 times among the ki∗k_i^*, and εn+1=(N−1)−∑k≥n+2εk\varepsilon_{n+1}=(N-1)-\sum_{k\ge n+2}\varepsilon_k. Expanding the coefficients as on the (4.3) page,

∑i=1N−11ki∗=∑k=n+12nεkk=2∑k=n+12n1k−1n+1+∑k=n+22n(2−εk)(1n+1−1k) ≥ 1τn′,\sum_{i=1}^{N-1}\frac1{k_i^*}=\sum_{k=n+1}^{2n}\frac{\varepsilon_k}k =2\sum_{k=n+1}^{2n}\frac1k-\frac1{n+1}+\sum_{k=n+2}^{2n}(2-\varepsilon_k) \Bigl(\frac1{n+1}-\frac1k\Bigr)\ \ge\ \frac1{\tau'_n},

the coefficient of 1/(n+1)1/(n+1) on the right being 1+∑k≥n+2(2−εk)=2n−1−∑k≥n+2εk=εn+11+\sum_{k\ge n+2}(2-\varepsilon_k)=2n-1-\sum_{k\ge n+2}\varepsilon_k=\varepsilon_{n+1}. Hence ϱ<τn′\varrho<\tau'_n, and with ϱ=τn′\varrho=\tau'_n the hypothesis fails: some k∈(n,2n]k\in(n,2n] has kgk≤τn′kg_k\le\tau'_n. Since 2∑k=n+12n1/k→2log⁡2=log⁡42\sum_{k=n+1}^{2n}1/k\to2\log2=\log4, τn′→1/log⁡4\tau'_n\to1/\log4, and choosing such a knk_n for each nn gives ω(xˉ)≤lim⁡τn′=1/log⁡4\omega(\bar x)\le\lim\tau'_n=1/\log4.

For the sharpness, the first nn terms of xk={log⁡2(2k−1)}x_k=\{\log_2(2k-1)\} are, modulo 11, the numbers log⁡2k\log_2k for n≤k≤2n−1n\le k\le2n-1 (the Section 2 page), so on the circle their nn gaps are log⁡2k+1k\log_2\frac{k+1}k for n≤k≤2n−1n\le k\le2n-1, and the n−1n-1 interior gaps of the interval are these nn circle gaps with the wrap gap, from the largest term back to x1=0x_1=0, removed. The smallest interior gap is therefore at least the smallest circle gap and at most the second smallest: log⁡22n2n−1≤gn≤log⁡22n−12n−2\log_2\frac{2n}{2n-1}\le g_n\le\log_2\frac{2n-1}{2n-2} for n≥2n\ge2, and both bounds times nn tend to 1/(2log⁡2)=1/log⁡41/(2\log2)=1/\log4, so ngn→1/log⁡4ng_n\to1/\log4. □\square

The circle statement does not transfer by itself: reading [0,1][0,1] as the circle adds the wrap gap y1+1−yNy_1+1-y_N, which can be the smallest gap, so mn1(a)≤gnm_n^1(a)\le g_n and (4.3) bounds the wrong side. The interval argument replaces the NN cyclic windows by the N−1N-1 adjacent pairs and the total length 11 by yN−y1≤1y_N-y_1\le1; its finite-nn bound τn′\tau'_n is weaker than the circle's τn(1)=(2∑k=n+12n1/k)−1\tau_n^{(1)}=(2\sum_{k=n+1}^{2n}1/k)^{-1} by the term 1/(n+1)1/(n+1) and has the same limit.

What it does not give.

  • Nothing for the question of Problem 480, which is proved with the sharp constant α\alpha and concerns a measure of a different quantifier structure: CC reads pairs at a fixed lag nn in order of insertion, with m→∞m\to\infty, while ω\omega and λ1\lambda_1 read the closest pair among all the first nn terms. The two measures are not comparable. A sequence whose first two terms coincide has ω(xˉ)=0\omega(\bar x)=0, while CC ignores any finite set of indices, so prepending a repeated term to the extremal sequence of the chapter's Theorem 2 gives ω=0\omega=0 and C=αC=\alpha; in the other direction the chapter's introduction, as the card of the chapter records, remarks that CC can be small while ω\omega stays large, when the close pairs occur far out (for instance ∣xm+1−xm∣=m−1/2|x_{m+1}-x_m|=m^{-1/2} at infinitely many mm gives C=0C=0 without disturbing ω\omega). So neither bound transfers to the other measure.
  • The "descent" is a resemblance of shape, not a dependency. Both arguments bound a sum of consecutive sorted gaps by 11 and bound each gap below from the hypothesis, but the 1949 count uses all NN adjacent pairs, the bound ϱ/ki∗\varrho/k_i^* from the largest index in the window, and the multiplicity bound 22, while the proof of Theorem 1 on p. 211 of the chapter uses only the pairs of an increasing subsequence of the order permutation of NN consecutive terms, the bound (1+ϵ)α/∣π(ik+1)−π(ik)∣(1+\epsilon)\alpha/|\pi(i_{k+1})-\pi(i_k)| from the lag hypothesis, and the exact extremal value umu_m of its Theorem 3, proved on pp. 188--210 and reconstructed nowhere in the corpus. No step of Section 4 enters Theorem 3.
  • No reverse transfer is available either. Whether a permutation extremal problem in the style of Theorem 3 could sharpen (4.3) for r≥2r\ge2, where the 1949 windows read r+1r+1 consecutive sorted terms, is addressed by no held source; for r=1r=1 the bound is sharp, and the growth of r−λrr-\lambda_r claimed by the 2026 preprint comes from the discrepancy route, not from a sharper count.

Next investigation. The Problem 480 page lists as an unread lead a later Chung--Graham paper on a sequence of points on a circle of circumference 11. Reading it would settle whether its circle measure is the 1949 λ1\lambda_1, a lag measure on the circle, or something else: a positive identification with the de Bruijn--Erdős constants or a variant would add a library hook for Problem 1221 and possibly small-rr information; a negative one leaves this connection at the background level of Proposition 480.1.

Outcome. Fails as a route to Problem 480 (proved, sharp constant, incomparable measure); the background transfer of the 1/log⁡41/\log4 bound to the interval, which the card of the note left unreconciled, is proved above.

Problem 1221 itself: the site's family against sequences of distinct points

Target. Problem 1221, status claimed, claim proved, under its mean-normalized reading: whether Λr−r\Lambda_r-r, r−λrr-\lambda_r and r(μr−1)r(\mu_r-1) tend to infinity. The erdosproblems.com family, like Section 1 of the 1949 note, admits coincident terms, while the two 2026 sources state their lower bounds over sequences of distinct points; the sources do not establish equality of the constants over the two families. This section records what the reconstructed arguments give for the larger family.

The two families. Distinct sequences form a subfamily, so the infima over all sequences are at most those over distinct sequences and the supremum is at least: μrall≤μrdist\mu_r^{\mathrm{all}}\le\mu_r^{\mathrm{dist}}, Λrall≤Λrdist\Lambda_r^{\mathrm{all}}\le\Lambda_r^{\mathrm{dist}}, λrall≥λrdist\lambda_r^{\mathrm{all}}\ge\lambda_r^{\mathrm{dist}}. An upper bound on μr\mu_r proved by exhibiting a sequence of distinct points, Theorem 2 of the balanced-stick preprint, passes to the erdosproblems.com family at once; the 1949 bounds are stated over all sequences; the lower bounds of the 2026 note and preprint do not pass by inclusion, and they are the subject here. The note's zero-length intervals are the multiset model used below: the first nn terms are listed in cyclic order by position, coincident terms in order of index; the nn gaps, some possibly 00, do not depend on the tie-break; an rr-span is the sum of rr consecutive gaps. With cyclic coordinates lifted by yi+n=yi+1y_{i+n}=y_i+1, its length is yi+r−yiy_{i+r}-y_i, which can equal 11 even when its two positions coincide on the circle. Nn(I)N_n(I) counts indices.

Where distinctness enters the reconstructed arguments (author-recorded reading of the folder's pages).

  • Positivity of the spans, used only to make ratios finite. Under the contradiction hypotheses, Rn≤ρR_n\le\rho for late nn in the note and the ratio hypothesis of Section 5 in the preprint, every late rr-span is positive by the mean identity mn≥Mn/ρ≥r/(ρn)m_n\ge M_n/\rho\ge r/(\rho n); where a span vanishes, the ratio conclusion holds trivially with M/0=+∞M/0=+\infty. The one-sided hypotheses (6.1) do not need positive spans.
  • The least distance δ\delta between distinct points of Pn0P_{n_0} in Lemma 4.2, used to keep early terms out of the short interval and to produce an interval with exactly LL terms. Proposition 1221.1 replaces it.
  • Nowhere else. Checked page by page: Lemma 2.1 (the moves FsF_s, BsB_s are bijections of index sets, the displacement bounds are positional, and the averaging counts with multiplicity); Proposition 3.1 (for the terminal bounds (3.2), among r+1r+1 terms in an arc, ordered by cyclic rank from the arc's start, the first and the last are rr places apart and the terms between them lie in the arc); Lemma 6.1 (the zero-sum identity); Lemma 6.2; Lemma 6.3 (for xx at no term's position, yiy_i is among the rr terms after xx exactly when xx lies in the lifted arc from yi−ry_{i-r} to yiy_i, projected to the circle; zero spans give empty arcs and length-one spans give full turns, as the composition page's covering identity writes out); Proposition 6.4; Lemma 7.2 (the planar points carry the distinct second coordinates i/Ni/N, so the imported planar theorem meets a set of distinct points); and in the 2026 note Lemma 3.1 with Lemma 2.1, Proposition 4.1 and Theorem 1.1, where a term inserted at an occupied position comes last among the terms at that position and splits the gap that starts at the previous last term into a zero piece and the old gap, so "one insertion splits one gap" stays true, and every inequality on those pages uses only gaps ≥0\ge0.

Proposition 1221.1 (Lemma 4.2 without distinctness; author-recorded). Let (xn)(x_n) be any sequence on T\mathbb T, coincident terms allowed, let B≥1B\ge1 and S≥2S\ge2, and suppose that (4.1) holds for all integers n≥n0n\ge n_0: ∣Nn((x,x+D/n])−D∣≤B|N_n((x,x+D/n])-D|\le B for all x∈Tx\in\mathbb T and 0≤D≤S0\le D\le S. Put L=⌊S⌋L=\lfloor S\rfloor. Then there are an integer L′L' with L−B≤L′≤L+BL-B\le L'\le L+B and a list z1,…,zL′∈(0,1)z_1,\ldots,z_{L'}\in(0,1), possibly with repeated entries, whose maximum prefix counting error satisfies HL′(z1,…,zL′)≤BH_{L'}(z_1,\ldots,z_{L'})\le B, with H0=0H_0=0 for the empty list. If the imported Theorem 4.1 holds for lists of distinct entries, it holds for all lists, and then B≥116log⁡(L−B)B\ge\frac1{16}\log(L-B) whenever L−B≥L0L-B\ge L_0.

Proof. Choose an integer N>n0N>n_0 with n0L/N<1n_0L/N<1 and put w=L/Nw=L/N. The positions of the first n0n_0 terms form a set QQ of at most n0n_0 points, and the set of a∈Ta\in\mathbb T for which (a,a+w](a,a+w] meets QQ has measure at most n0w<1n_0w<1; the finitely many aa for which aa or a+wa+w is the position of one of the first NN terms are excluded too. Fix such an aa and put J=(a,a+w]J=(a,a+w]. By (4.1) at time NN with D=L≤SD=L\le S, the number L′=NN(J)L'=N_N(J) satisfies ∣L′−L∣≤B|L'-L|\le B, and every term in JJ has index greater than n0n_0. List the terms in JJ by index, m1<⋯<mL′≤Nm_1<\cdots<m_{L'}\le N, and put zi=(xmi−a)/w∈(0,1)z_i=(x_{m_i}-a)/w\in(0,1). Fix jj and let n=mj≥n0+1n=m_j\ge n_0+1; the terms of PnP_n in JJ are exactly the first jj listed, so #{i≤j: zi≤u}=Nn((a,a+uw])\#\{i\le j:\ z_i\le u\}=N_n((a,a+uw]) for 0≤u≤10\le u\le1. Put f(u)=Nn((a,a+uw])−nuwf(u)=N_n((a,a+uw])-nuw. The arc (a,a+uw](a,a+uw] has length D/nD/n with D=nuw≤Nw=L≤SD=nuw\le Nw=L\le S, so ∣f(u)∣≤B|f(u)|\le B by (4.1); the complementary arc (a+uw,a+w](a+uw,a+w] has length D′/nD'/n with D′=n(1−u)w≤SD'=n(1-u)w\le S and count j−Nn((a,a+uw])j-N_n((a,a+uw]), so ∣f(1)−f(u)∣≤B|f(1)-f(u)|\le B. Since f(1)=j−nwf(1)=j-nw,

#{i≤j: zi≤u}−ju=f(u)−uf(1)=(1−u)f(u)−u(f(1)−f(u)),\#\{i\le j:\ z_i\le u\}-ju=f(u)-uf(1)=(1-u)f(u)-u\bigl(f(1)-f(u)\bigr),

of absolute value at most BB; for the convention zi<uz_i<u the count is the left limit, with the same supremum. So HL′(z1,…,zL′)≤BH_{L'}(z_1,\ldots,z_{L'})\le B.

For the last sentence let z1,…,zMz_1,\ldots,z_M be any list with M≥1M\ge1 and η>0\eta>0, and let δ>0\delta>0 be smaller than η/M2\eta/M^2, than (1−max⁡izi)/M(1-\max_iz_i)/M, and than the least distance between distinct values of the list divided by MM; omit the last restriction if the list takes only one value. For each value vv taken by m≥2m\ge2 entries, move those entries, in list order, to v,v+δ,…,v+(m−1)δv,v+\delta,\ldots,v+(m-1)\delta; the new list z′z' has distinct entries in [0,1)[0,1). For a prefix jj the function F(u)=#{i≤j: zi<u}−juF(u)=\#\{i\le j:\ z_i<u\}-ju is unchanged outside the intervals (v,v+(m−1)δ](v,v+(m-1)\delta], and on such an interval the new function lies between F(v)−j(m−1)δF(v)-j(m-1)\delta and F(v+)F(v+), where F(v)F(v) and F(v+)F(v+) are the values of FF just before and just after its jump at vv; so the new prefix error is at most HM(z)+M2δ<HM(z)+ηH_M(z)+M^2\delta<H_M(z)+\eta, and HM(z′)≤HM(z)+ηH_M(z')\le H_M(z)+\eta. If Theorem 4.1 holds for distinct lists, HM(z)≥HM(z′)−η≥116log⁡M−ηH_M(z)\ge H_M(z')-\eta\ge\frac1{16}\log M-\eta for every η>0\eta>0, hence HM(z)≥116log⁡MH_M(z)\ge\frac1{16}\log M. Applied to the list above with M=L′≥L−BM=L'\ge L-B, this gives B≥116log⁡(L−B)B\ge\frac1{16}\log(L-B). □\square

Proposition 1221.2 (the fixed-rr bound over all sequences; author-recorded). For every integer r≥2r\ge2 and every sequence on T\mathbb T, coincident terms allowed, with M/0=+∞M/0=+\infty,

lim sup⁡n→∞Mn(r)mn(r) ≥ 1+rr2−1.\limsup_{n\to\infty}\frac{M_n^{(r)}}{m_n^{(r)}}\ \ge\ 1+\frac r{r^2-1}.

Proof. Suppose the upper limit is smaller and choose ρ\rho, η\eta, N1N_1 as on the Theorem 1.1 page; then Rn≤ρR_n\le\rho for n≥N1n\ge N_1, so every rr-block at those times is positive, while single gaps may vanish. The three pages are now read with gaps ≥0\ge0: Lemma 2.1 (a block containing a zero piece is compared with a block of the previous time as before), Lemma 3.1 (the blocks WiW_i, UiU_i and the protected block of part 2 need only nonnegative gaps), Proposition 4.1 (the counting is on gaps as combinatorial objects; an insertion at an occupied position is a split with a zero piece, and a zero gap may later be split into two zero pieces, which the descendant accounting treats like any split), and Theorem 1.1 (the mean identity and the epoch recursion). The contradiction is reached as on those pages. □\square

Conditional deduction 1221.3 (author-recorded). Let (P) be the premise that the chain reconstructed on the preprint's pages proves Theorem 1.1 for sequences of distinct points, with its two imported inputs as stated there (Theorem 4.1, stated there for every list in [0,1)[0,1), of which only the case of distinct entries is needed, and Halász's Theorem 7.1). Then the same chain, with Proposition 1221.1 in place of Lemma 4.2, proves the three bounds of Theorem 1.1, with the same cc and the same coefficient 1/1001/100, and an absolute threshold in place of r0r_0, for every sequence on T\mathbb T, coincident terms allowed; in particular, under (P), all three parts of the mean-normalized conjecture hold for the erdosproblems.com family. Argument: Sections 2--3 and 6--8 use distinctness nowhere (the checklist above); Section 5 derives (2.1) from the ratio hypothesis through the mean identity alone; Proposition 1221.1 gives B≥116log⁡(⌊S⌋−B)B\ge\frac1{16}\log(\lfloor S\rfloor-B), and since B=3100log⁡r+O(1)B=\frac3{100}\log r+O(1) while log⁡⌊S⌋=12log⁡r−O(log⁡log⁡r)\log\lfloor S\rfloor=\frac12\log r-O(\log\log r), subtracting BB inside the logarithm changes it by o(1)o(1) and the comparison of Section 5 is unchanged; Lemma 7.2's planar sets are sets of distinct points, so Theorem 7.1 applies as before. Premise (P) is an explicit assumption: the source claim is unrefereed, and the focused review of this deduction did not check its two imports or independently verify the full chain. The separate composition below supplies written proofs for a variant with coefficient 1/2001/200; it does not establish (P) with the coefficient 1/1001/100. No status changes.

What it does not give. Equality of the constants over the two families is not proved: under (P) the extended lower bounds and the shared upper bound give μr−1\mu_r-1 the same order log⁡r/r\log r/r over both families, but μrall<μrdist\mu_r^{\mathrm{all}}<\mu_r^{\mathrm{dist}} is not excluded, and nothing here needs it. The sources state their theorems for distinct points; the extension is the corpus's reading of the reconstructed arguments, not a statement of any source. The connections grade accepts the focused check of the extraction and the conditional extension, with (P) still an explicit premise. Its review took the reconstruction pages at their existing standing and did not certify their entire source chain. The filed reconstruction reviews cover their distinct-point subjects, relative to the imported inputs; neither review set covers the complete all-sequence composition.

Further scrutiny. The route recorded as the lead consecutive_gap_bounds_coincident_points has a focused conditional warrant as described above. The complete composition requires independent whole-conclusion scrutiny of its discrepancy inputs, the span-to-count chain, the lifted-arc convention and the closing quantifiers. A positive verdict would support that full argument at the scope its grade accepts; a defect must identify the affected branch and its first unsupported estimate.

Outcome. Transfers for the fixed-rr bound (Proposition 1221.2); transfers conditionally for the claimed growth bounds (deduction 1221.3, under the standing of the claim). The composition page instead proves the finite-list and planar estimates it uses and composes the all-sequence argument without assuming (P), with ratio coefficient 1/2001/200 in place of 1/1001/100. That whole argument remains author-recorded.

The span-to-count transfer has no second consumer

The mechanism at its actual scope. The reusable content of the 2026 preprint is the passage from span control to counting control for a nested family of point sets: the sets Pt={x1,…,x⌊t⌋}P_t=\{x_1,\ldots,x_{\lfloor t\rfloor}\} grow by one term per step, and the hypothesis is an eventual bound on the rr-spans at scale 1/t1/t, two-sided in Lemma 2.1 (every span in [(r−at)/t,(r+bt)/t][(r-a_t)/t,(r+b_t)/t] with at+bt≤Aa_t+b_t\le A) or one-sided in Lemma 6.1 (only nMn(r)−r≤AnM_n^{(r)}-r\le A, or only r−nmn(r)≤Ar-nm_n^{(r)}\le A), with A≥1A\ge1 and r≥C0Ar\ge C_0A for an absolute C0C_0, that is, a span error small compared with rr. The conclusion is a counting error O(A)O(A), pointwise (Proposition 3.1) or in spatial L1L^1 (Proposition 6.4), on arcs holding at most Ar/log⁡2(r/A)\sqrt{Ar}/\log^2(r/A) terms, with a threshold in tt depending on rr, AA and the sequence. The nesting is essential: the cyclic walks compare PtP_t with Ps⊇PtP_s\supseteq P_t at nearby times, and the localization of Lemma 4.2 and Lemma 7.2 reads the insertion time as a coordinate. The converse passage, from counting control to span control, is the elementary direction and is what Theorem 2 of the balanced-stick preprint takes from its Theorem 3.

The search. The problems, research and theory trees were searched for sequences on the circle or in the unit interval, consecutive gaps and spacings, discrepancy, and the named imported theorems. No open problem consumes the mechanism:

  • Problem 255 is an input, not a consumer (the section above).
  • Problem 997 (well-distribution of {αpn}\{\alpha p_n\}; proved) counts terms with indices in a block n<m≤n+kn<m\le n+k of fixed length for every shift nn, a statement about all blocks of one sequence rather than about the prefixes PtP_t of a growing family; the mechanism's conclusion concerns prefixes on arcs of length D/nD/n, and the problem is proved.
  • Problem 987 (exponential sums of a sequence in (0,1)(0,1); proved) and Problem 998 (bounded remainder intervals of {αm}\{\alpha m\}; disproved as worded, with Kesten's length criterion the correct theorem) are resolved, and the Kronecker sequence that appears in the balanced-stick preprint enters the folder only through the imported Theorem 3, which is not reconstructed.
  • Problem 992, Problem 994, Problem 995 and Problem 996 are metric statements for almost every α\alpha; the mechanism is deterministic for one sequence and carries no metric information.
  • Problem 988, Problem 989 and Problem 991 concern finite point sets on the sphere or a sequence in the plane without the one-insertion-per-step structure, and are resolved.
  • The integer-sequence gap problems (for instance Problem 208 and Problem 153) concern the gaps of one fixed set, not of a growing family, and the theory tree holds no claim about sequences in the unit interval.

Outcome. Open: no second consumer in the corpus, so no method page is made. A future consumer would be recognized by a hypothesis that controls the rr-th neighbor distances of a nested growing family uniformly in the position to within an error small compared with rr, and a conclusion that counts terms in short arcs; the (4.3) count of 1949, rerun on the interval in Proposition 480.1, is the only transfer of the folder's mechanisms to another setting proved here.