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 Aug 24 answered Finding integer points on elliptic curves via divisibility conditions like $(a+b)^2 \mid (2b^3+6ab^2-1)$ Aug 24 reviewed Leave Closed Maximal score for the 2048 game Aug 24 reviewed Leave Open Repetend digit graphs for $1/n$ in base $b$ Aug 24 reviewed Leave Open Finding integer points on elliptic curves via divisibility conditions like $(a+b)^2 \mid (2b^3+6ab^2-1)$ Aug 23 comment Smooth sums of coprime smooth integers @StefanKohl: This is not specified, but could be calculated with some effort. It would likely be quite large. Aug 23 revised Smooth sums of coprime smooth integers Reference to recent work added Aug 23 comment Separation of lattice points on the Mordell elliptic curve To clarify: your question is not about the difference between $x^3$ and $y^2$ (Hall's conjecture), but rather about the difference between those values of $x$ for which the spacing between $x^3$ and its nearest square is small (below $\sqrt{x}$). Is that correct? Aug 23 reviewed Leave Closed Aperiodic set of corner Wang Tile Aug 23 reviewed Close Why calculus textbooks do not include the natural integration constants in the tables of integrals? Aug 22 reviewed Close book for probability Aug 22 reviewed Leave Open A group allowing exactly 7 group topologies Aug 21 reviewed No Action Needed Controling mixed derivatives Aug 21 reviewed Close Where to find (personal) motivation Aug 20 revised The Diophantine equation $x^p - 4y^p = z^2$ Added top level tag Aug 20 comment The Diophantine equation $x^p - 4y^p = z^2$ @FelipeVoloch: Good point! Aug 20 revised The Diophantine equation $x^p - 4y^p = z^2$ added 354 characters in body Aug 20 comment The Diophantine equation $x^p - 4y^p = z^2$ @GHfromMO: Thanks for pointing that out! I'll also add a link to Darmon's paper. Aug 20 answered The Diophantine equation $x^p - 4y^p = z^2$ Aug 20 comment The Diophantine equation $x^p - 4y^p = z^2$ Well if there were infinitely many solutions, it would contradict a Theorem of Darmon and Granville! See math.mcgill.ca/darmon/pub/Articles/Research/12.Granville/… . Aug 20 reviewed No Action Needed What is the abutment filtration of the second spectral sequence of hypercohomology?