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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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1984_12_01_furedi_palasti: Füredi and Palásti exhibit, for every d at least 4 not divisible by 9, an arrangement of d lines with no point on four lines and no Gallai triangle, answering the question negatively.
2016_04_14_escudero: Escudero exhibits, for every number of lines at least 4, an arrangement with no point on four lines and no Gallai triangle, answering the question negatively for every d.
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