Shane O Rourke
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 Jan 25 awarded Yearling Dec 20 awarded Constituent Dec 8 awarded Caucus Nov 27 awarded Nice Answer Nov 18 answered Most ambiguous and inconsistent phrases and notations in maths Sep 3 comment Question about initial value problem I suspect that there is a missing pair of brackets (or parentheses if you will) in the differential equation: shouldn't it be $\frac{dy}{dx}=(1-2x)/y$? Sep 3 answered Question about initial value problem Sep 2 awarded Yearling Dec 21 comment Isomorphism and direct product of groups Isn't $\mathbb{Z}_{mk}$ always cyclic? ;) Dec 11 comment What are a few examples of noncyclic finite groups? Indeed it's not restricted to finite groups: every group $G$ acts by (e.g.) right multiplication on itself, giving an embedding of $G$ in the symmetric group on $G$. Sep 13 revised $\ln(-1) - \ln(-2)$ is it definable or have answer? replaced x\geq 0 by x>0 Sep 13 suggested approved edit on $\ln(-1) - \ln(-2)$ is it definable or have answer? Sep 2 awarded Yearling Aug 26 answered An exercise in logic Jul 19 comment $ρ_ωG$ is a subgroup of $ρG$ containing $G$. Maybe you could tell us what the Rajkov completion is? Jul 3 revised Is this true? $f(g(x))=g(f(x))\iff f^{-1}(g^{-1}(x))=g^{-1}(f^{-1}(x))$. Added clarification Jul 3 answered Is this true? $f(g(x))=g(f(x))\iff f^{-1}(g^{-1}(x))=g^{-1}(f^{-1}(x))$. Jun 17 answered Relation between differentiable,continuous and integrable functions. May 24 comment A 2nd countable metric space is separable @AsafKaragila Ah, indeed. I somehow managed not to see the word `metric' in my haste. May 24 comment A 2nd countable metric space is separable Regarding the converse: there are spaces that are separable but not second countable. See en.wikipedia.org/wiki/Lower_limit_topology for example.