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visits member for 2 years, 11 months
seen Mar 4 at 11:30

Jul
2
awarded  Curious
May
2
awarded  Popular Question
Sep
28
awarded  Notable Question
Apr
19
awarded  Popular Question
Feb
4
awarded  Notable Question
Aug
2
awarded  Yearling
Jul
30
comment What is the correct way to solve $|2K^3-2K^4|$ determinant?
Of course.. Totally forgot about $I-K$. Thanks!
Jul
30
revised What is the correct way to solve $|2K^3-2K^4|$ determinant?
deleted 30 characters in body
Jul
30
comment What is the correct way to solve $|2K^3-2K^4|$ determinant?
Why couldn't we do the same trick without knowing how K is build? We know K is invertible ($det(K) \neq 0$) and we know that its size is $3\times 3$. Isn't it enough?
Jul
30
revised What is the correct way to solve $|2K^3-2K^4|$ determinant?
pointing out the mistake
Jul
30
accepted What is the correct way to solve $|2K^3-2K^4|$ determinant?
Jul
30
revised What is the correct way to solve $|2K^3-2K^4|$ determinant?
Added the matrix K
Jul
30
comment What is the correct way to solve $|2K^3-2K^4|$ determinant?
@GerryMyerson: In which specific cases it does equal?
Jul
30
asked What is the correct way to solve $|2K^3-2K^4|$ determinant?
Jun
27
awarded  Popular Question
May
31
accepted How to prove that the union of two subspaces must be subsets of each other?
May
31
revised How to prove that the union of two subspaces must be subsets of each other?
edited title
May
31
asked How to prove that the union of two subspaces must be subsets of each other?
Apr
25
accepted Matrix multiplication proof: $(A+B)^k$ for matrices such that $A^2=B^2=0$ and $AB=BA$
Apr
6
asked Matrix multiplication proof: $(A+B)^k$ for matrices such that $A^2=B^2=0$ and $AB=BA$