Sorry, subject should have been Neat Dragon *puzzle*. Partial SPOILER: A picture of the answer <http://gosper.org/maxdragseg.png>, with ℵ₀ "ruler function" ticks at the dyadic rationals indicating the triple points. The segment appears to graze the Dragon boundary, which has no triple points. It must be that the grazing points are not tick points. There remains the puzzle of finding|guessing the endpoints. —rwg There is another alef in my font collection: א . It somehow screws up succeeding subscripts and superscripts, and makes my cursor-right key move left! Does this happen for you? On Sun, Jan 26, 2020 at 12:32 AM Bill Gosper <billgosper@gmail.com> wrote:
What is the longest line segment inscribable in the Dragon linking 0+0i to 1 + 0i via (1+i)/2? "Hint": If the segment be t z2 + (1-t)z1, with 0<t<1, then every point on it is (empirically, at least) a triple point of the spacefill whenever t is a dyadic rational! —rwg (This impacts OEIS A260747, etc.)