781 reputation
59
bio website
location
age
visits member for 3 years, 3 months
seen 7 hours ago

16h
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.
May
20
awarded  Constituent