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Jun
16
reviewed Approve Showing that $\Bbb R^3$ is not homeomorphic to $S^3$.
Jun
12
comment Abelian $p$-group with unique subgroup of index $p$
Why every proper subgroup is contained in $H$?, $H$ is maximal, but is not obvious that $H$ is the unique maximal. For example, a group of index $p^2$ could be also a maximal subgroup.
Jun
10
reviewed Approve A limit question
Jun
9
comment What is the last digit?
Or a smaller basis.
May
30
comment Proof to show function f satisfies Lipschitz condition when derivatives f' exist and are continuous
yes, youre right
May
30
accepted Working with $z$, $\overline{z}$ instead of $\operatorname{Re}(z)$, $\operatorname{Im}(z)$
May
19
comment Intersection of affine varieties is affine
@oxeimon But in this case $M,N$ are not necessary open.
May
19
revised Intersection of affine varieties is affine
added 12 characters in body
May
19
comment Intersection of affine varieties is affine
I tried but I couldn't prove it.
May
15
awarded  Famous Question
May
12
awarded  Yearling
May
3
reviewed Reject Checking reasoning for finding Jordan-Canonical Form for 3x3 matrix
May
1
awarded  Popular Question
Apr
30
awarded  Popular Question
Apr
28
accepted weak-star convergence to Dirac Delta function
Apr
28
comment weak-star convergence to Dirac Delta function
Yes, but I think one only needs continuity.
Apr
28
asked weak-star convergence to Dirac Delta function
Apr
17
reviewed Approve rectangular groups are completely simple and orthodox
Mar
12
awarded  Notable Question
Mar
10
awarded  Good Question