Shane O Rourke
Reputation
781
Top tag
Next privilege 1,000 Rep.
Create tags
 Dec20 awarded Constituent Dec8 awarded Caucus Nov27 awarded Nice Answer Nov18 answered Most ambiguous and inconsistent phrases and notations in maths Sep3 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 $\frac{dy}{dx}=(1-2x)/y$? Sep3 answered Question about initial value problem Sep2 awarded Yearling Dec21 comment Isomorphism and direct product of groups Isn't $\mathbb{Z}_{mk}$ always cyclic? ;) Dec11 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 $G$. Sep13 revised $\ln(-1) - \ln(-2)$ is it definable or have answer? replaced x\geq 0 by x>0 Sep13 suggested approved edit on $\ln(-1) - \ln(-2)$ is it definable or have answer? Sep2 awarded Yearling Aug26 answered An exercise in logic Jul19 comment $ρ_ωG$ is a subgroup of $ρG$ containing $G$. Maybe you could tell us what the Rajkov completion is? Jul3 revised Is this true? $f(g(x))=g(f(x))\iff f^{-1}(g^{-1}(x))=g^{-1}(f^{-1}(x))$. Added clarification Jul3 answered Is this true? $f(g(x))=g(f(x))\iff f^{-1}(g^{-1}(x))=g^{-1}(f^{-1}(x))$. Jun17 answered Relation between differentiable,continuous and integrable functions. May24 comment A 2nd countable metric space is separable @AsafKaragila Ah, indeed. I somehow managed not to see the word `metric' in my haste. May24 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. May20 awarded Constituent