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asked The general picture of spectral oeprator
Aug
20
asked Prove $\det(A+BC)=\det(A+CB)$ if $AB=BA$
Aug
18
asked Normal transformation with eigenvalue in real and complex case
Aug
7
accepted Prove $AB=BA$ if $A^kB=BA^k$ and $A$ positive definite
Aug
6
comment Prove $AB=BA$ if $A^kB=BA^k$ and $A$ positive definite
@MoseWintner it just gives AB,BA similar
Aug
6
revised Prove $AB=BA$ if $A^kB=BA^k$ and $A$ positive definite
edited title
Aug
6
asked Prove $AB=BA$ if $A^kB=BA^k$ and $A$ positive definite
Aug
6
revised If $A$ is nipotent, how to prove that $A+A^*$ is not nilpotent?
added 5 characters in body
Aug
6
revised If $A$ is nipotent, how to prove that $A+A^*$ is not nilpotent?
added 5 characters in body
Aug
6
asked If $A$ is nipotent, how to prove that $A+A^*$ is not nilpotent?
Aug
3
comment The projection $EF=E$ imply $M_2\subset M_1$?
What is R(i+j)?
Aug
3
comment The projection $EF=E$ imply $M_2\subset M_1$?
I don't understand your notation
Aug
3
asked The projection $EF=E$ imply $M_2\subset M_1$?
Aug
1
revised Prove for symmetric real matrix $M$,$z^TMz>0$ for real vector $z$ for real implies it's true in complex
added 1 character in body
Aug
1
asked Prove for symmetric real matrix $M$,$z^TMz>0$ for real vector $z$ for real implies it's true in complex
Jul
29
asked Prove there exists a self-adjoint transformation $C$ s.t. $CA=B$ if $A$ and $AB$ are self adjoint
Jul
29
asked Why we define the adjoint operator
Jul
23
asked Topology property of inner product and norm
Jul
21
comment $Ker(A-\lambda_j)^{k_j},j=1,\cdots p$ span the whole space $V$?
I mean the basis in each $Ker(A-\lambda)^{k_y}$ together are linearly independent
Jul
21
comment $Ker(A-\lambda_j)^{k_j},j=1,\cdots p$ span the whole space $V$?
how to show the basis in $Ker(A-\lambda_j)^{k_j}$ are linearly independent