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visits member for 3 years, 4 months
seen Sep 15 at 3:37

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Sep
5
revised Extension of Sobolev functions
Texified the question
Sep
5
suggested suggested edit on Extension of Sobolev functions
Sep
1
comment If $A\geq B$ and $A>C$, then does it follow that $B>C$?
Just post your "inequalities about the inf and sup of the range of functions"
Aug
23
awarded  Necromancer
Jun
17
comment Mathematica: How to convert scales to frequencies?
@J.M. Well, it should have been in MMA.SE
Jun
17
comment Suppose that a $3\times 3$ matrix $M$ has an eigenspace of dimension $3$. Prove that $M$ is a diagonal matrix.
@user46080 Well, OK, calm...
Jun
17
comment Finding the limit of a matrix
Use the Jordan canonical from
Jun
17
comment Suppose that a $3\times 3$ matrix $M$ has an eigenspace of dimension $3$. Prove that $M$ is a diagonal matrix.
@user46080 OK, I've messed up with eigenspace and the space spanned by eigenvectors. And I've updated my answer. If you feel it somehow helpful, you can cancel the downvote.
Jun
17
revised Suppose that a $3\times 3$ matrix $M$ has an eigenspace of dimension $3$. Prove that $M$ is a diagonal matrix.
deleted 245 characters in body
Jun
17
revised Suppose that a $3\times 3$ matrix $M$ has an eigenspace of dimension $3$. Prove that $M$ is a diagonal matrix.
deleted 245 characters in body
Jun
17
revised Suppose that a $3\times 3$ matrix $M$ has an eigenspace of dimension $3$. Prove that $M$ is a diagonal matrix.
Texified the title
Jun
17
suggested suggested edit on Suppose that a $3\times 3$ matrix $M$ has an eigenspace of dimension $3$. Prove that $M$ is a diagonal matrix.
Jun
17
revised Suppose that a $3\times 3$ matrix $M$ has an eigenspace of dimension $3$. Prove that $M$ is a diagonal matrix.
added 263 characters in body
Jun
17
answered Suppose that a $3\times 3$ matrix $M$ has an eigenspace of dimension $3$. Prove that $M$ is a diagonal matrix.
Jun
11
awarded  Quorum
May
25
comment Submit papers: arxiv or vixra?
You can also ask at academia.stackexchange.com
May
17
awarded  Yearling
May
6
awarded  Caucus
Apr
17
comment About the spectral radius of a kind of matrices
I am sorry but I have left out a condition: at least one entry of $A$ is negative.
Apr
17
revised About the spectral radius of a kind of matrices
added 161 characters in body