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May
18
comment Derivative of $f(A) = \|A x\|^2$ with respect to the Matrix
I think I fixed it
May
18
comment Derivative of $f(A) = \|A x\|^2$ with respect to the Matrix
Haven't heard of gradient matrix, but in the sense that I have it, the i,jth entry of my answer is the derivative of f with respect to the i,jth entry of the original matrix. You are right that the operator is not a matrix multiplication.
May
18
comment Derivative of $f(A) = \|A x\|^2$ with respect to the Matrix
Saw this just as I was about to finish writing my solution! Thanks. You can also put the solution as a matrix
May
18
accepted Derivative of $f(A) = \|A x\|^2$ with respect to the Matrix
May
18
answered Derivative of $f(A) = \|A x\|^2$ with respect to the Matrix
May
18
revised Derivative of $f(A) = \|A x\|^2$ with respect to the Matrix
found mistake in derivation
May
18
asked Derivative of $f(A) = \|A x\|^2$ with respect to the Matrix
May
18
awarded  Popular Question
Apr
28
comment How to convert this particular expression into some desired form?
You can cancel out the exponentials in your dy/dx
Apr
28
comment How to convert this particular expression into some desired form?
Normally $dy/dx$ is a function of $x$ but it's interesting that here it is a function of $t$.
Apr
28
suggested rejected edit on How to convert this particular expression into some desired form?
Apr
28
revised How to convert this particular expression into some desired form?
latex issues
Apr
28
suggested approved edit on How to convert this particular expression into some desired form?
Apr
22
comment Intersection of 2 high dimensional balls
I asked the professor today and he said just because it's "easy" doesn't mean it will take less than a week. He said it might just be large computation involving integrals and maybe there's no intuitive way to see it.
Apr
21
comment Intersection of 2 high dimensional balls
@Bye_World Yes that's another way of saying it. The reason I said probability was to avoid a constant factor.
Apr
21
asked Intersection of 2 high dimensional balls
Apr
7
answered If $f \geq 0$ is continuous and $\int_{a}^{b} f(x) \, dx = 0$, then $f =0$
Apr
5
accepted Equivalence of Galois groups of two different splitting fields of the same polynomial
Apr
2
revised Question about Random Walks and An $O^*(n^5)$ Volume Algorithm for Convex Bodies - Kannan Lovasz Simonovits 97
added motivation/background
Apr
1
awarded  Popular Question