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

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2026_07_15_luo_yang_zhu: For every fixed lambda > 0 and all large n, complex numbers of modulus at least one have a power sum of index between 2 and n + 1 above e^(-lambda n), so no constant C > 1 exists; unreviewed, with only partial Lean support.

2026_08_03_tan_wang_huang_chen: A lower bound exp(-(1 + o(1)) sqrt(n) log n) for the largest power sum of index 2 to n + 1 of n complex numbers of modulus at least one, from a residual bound for polynomials with zeros in the closed unit disk; unreviewed.