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Dec
16
comment Find derivative of $f(x)=(x+2)^{(x-1)}$
OK, I get it. It has nothing to do with the logarithm.
Dec
16
comment Find derivative of $f(x)=(x+2)^{(x-1)}$
Sounds like the same as $f$ except for the positiveness.
Dec
16
revised Find derivative of $f(x)=(x+2)^{(x-1)}$
Change ln to \ln
Dec
16
suggested approved edit on Find derivative of $f(x)=(x+2)^{(x-1)}$
Dec
16
comment Find derivative of $f(x)=(x+2)^{(x-1)}$
What are $a$, $b$ and $c$ here?
Nov
12
comment solution of $y^2 - x = 15$ and $x^2 -xy = 2009$
What do you mean by the symbol "|".
Nov
12
comment Infinite self-convolution for a function
Convolution corresponds to the PDF of the sum of random variables. I think something can be obtained by the law of large numbers.
Sep
9
comment What are some examples of mathematics that had unintended useful applications much later?
I think this is kind of "application in mathematics".
Sep
5
comment Permutation matrix notation
You may borrow the notations from permutation group en.wikipedia.org/wiki/Permutation_group
Sep
5
revised Extension of Sobolev functions
Texified the question
Sep
5
suggested approved 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