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 Jul 27 accepted Prove that for $\alpha$ an ordinal, $\alpha \le \omega^\alpha$. Jul 24 revised Cubic Planar Graphs have $2^m-1$ Hamilton Cycles, contradicting Bosak… added 401 characters in body Jul 24 answered Cubic Planar Graphs have $2^m-1$ Hamilton Cycles, contradicting Bosak… Jul 23 revised Proving that if $p^2 = a^2 + 2b^2$ then also $p$ can be written in form $a^2 +2b^2$ added 1 character in body Jul 23 comment Proving that if $p^2 = a^2 + 2b^2$ then also $p$ can be written in form $a^2 +2b^2$ With hindsight splitting into the three cases was unnecessary, you only need that $(p)$ splits into one or two prime ideals, but maybe it's instructional to leave it in. Jul 23 answered Proving that if $p^2 = a^2 + 2b^2$ then also $p$ can be written in form $a^2 +2b^2$ Jul 11 comment For what functions is this theorem correct? @joriki The cardinality. One of the conditions for the theorem to be true is surely that preimages are finite. Jul 11 comment For what functions is this theorem correct? @joriki Apologies, I meant preimage of an element in the image. I thought you were being sarcastic. Jul 11 comment For what functions is this theorem correct? @joriki How is that relevant? Jul 9 comment For what functions is this theorem correct? That is correct. Jul 9 asked For what functions is this theorem correct? Jun 23 comment Prove that for $\alpha$ an ordinal, $\alpha \le \omega^\alpha$. Aha, thanks. I see. Jun 23 comment Prove that for $\alpha$ an ordinal, $\alpha \le \omega^\alpha$. My non-understanding lies elsewhere: why does the result follow from this? Jun 23 asked Prove that for $\alpha$ an ordinal, $\alpha \le \omega^\alpha$. Jun 16 awarded Notable Question May 11 accepted Closed form or asymptotic expansion for $\int_0^m \frac{n^x}{\Gamma(x+1)}dx$? Apr 27 revised An integration question to be solved without using differentiation under the integral sign. deleted 9 characters in body Mar 23 comment Dirac delta implies continuous? @Woodface I don't have a rigorous one. Mar 20 comment Show that there are only finitely many subgroups of $F$ in which $H$ can be of finite index. $F$ is free on how many generators? Mar 20 asked Dirac delta implies continuous?