Mathematics
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A.Γ.
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PhD in Math (1997) from St.Petersburg University. Academia since then.

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All Questions Answers
Score Newest
answer
150
Derivative of the inverse of a matrix
Oct 9, 2015
answer
55
Why does $ \int_0^1 \lceil { x\sin({1 \over x})} \rceil \,dx = 1 - \frac{\log(4)}{2\pi} $?
Jul 29, 2015
answer
39
Why is determinant a multilinear function?
Aug 20, 2015
answer
34
The product of two positive definite matrices has real and positive eigenvalues?
Jul 17, 2015
answer
23
Is the sum of singular and nonsingular matrix always a nonsingular matrix?
Oct 31, 2016
answer
20
Calculating dimension of the intersection of two subspaces
May 4, 2017
answer
16
Is there any intuition why the following matrix is positive semidefinite?
Nov 16, 2019
answer
16
The difference between applying a rotation matrix to a vector (points) and to a matrix (transformation)
Jan 4, 2019
answer
16
Quasi-newton methods: Understanding DFP updating formula
May 13, 2017
answer
15
Conjecture on zeros of analytic function
Jul 28, 2015

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