haemhweg
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 Mar 8 awarded Popular Question Feb 21 awarded Notable Question Jan 4 awarded Yearling Aug 31 awarded Popular Question Aug 31 comment What solution would you come up with for this problem? I am not quite sure if usage of decimal point is permitted, but thanks for your contribution. Aug 31 comment Proving “if” direction of continuous iff sequence x_n converging to x implies f(x_n) converges to f(x) $x_n$ is arbitrary sequence so what is exactly $x_N$? Aug 31 asked What solution would you come up with for this problem? Jun 15 accepted Prove that the class of non-standard models of arithmetics is not axiomatizable Jun 15 comment Is arrow notation for vectors “not mathematically mature”? Truer words never spoken. Jun 15 asked Prove that the class of non-standard models of arithmetics is not axiomatizable Jun 15 comment Prove that class of models isomorphic to some infinite model $M$ is not countably axiomatizable Thanks, I guess this argument does it. I didn't make it to relate cardinality to the isomorphy, I guess. Jun 15 asked Prove that class of models isomorphic to some infinite model $M$ is not countably axiomatizable May 15 awarded Popular Question Jan 4 awarded Yearling Dec 17 awarded Caucus Dec 11 revised Why there is this kind of relation between power and factorial? deleted 38 characters in body Dec 2 accepted Prove that partial differential equation has no weak solution Dec 2 comment Prove that partial differential equation has no weak solution Thank you for your profound elaboration, this is exactly what I was looking for. My problem was that I could really figure out how $v$ should look like to fulfill given conditions and still stay in $H^1_0(0,1)$. Dec 2 comment Variational form of boundary value problem Yes it will do, thank you. Dec 1 comment Prove that partial differential equation has no weak solution I am not sure because I suppose weak solutions can differ from classical ones, so $u$ could have another form rather than one above.