Mathematics
user avatar
user avatar
user avatar
Anton Grudkin
  • Member for 6 years, 1 month
  • Last seen more than a week ago
Profile Activity
Stats
2,820
reputation
49k
reached
83
answers
0
questions
Communities
About

I study physics and love math.

Badges
View all badges
This user doesn’t have any gold badges yet.
14
silver badges
22
bronze badges
Top tags
View all tags
47
Score
22
Posts
27
Posts %
40
Score
14
Posts
17
Posts %
20
Score
6
Posts
7
Posts %
14
Score
5
Posts
6
Posts %
12
Score
7
Posts
8
Posts %
11
Score
6
Posts
7
Posts %
Top posts
View all questions and answers
All Questions Answers
Score Newest
answer
15
$\arctan x=\frac{1}{2}i[\ln(1-ix)-\ln(1+ix)]$
Jun 12, 2016
answer
11
Derivative of product of matrix by vector
Jun 6, 2018
answer
7
Sylvester's law of inertia
Jun 8, 2016
answer
5
We have matrix $A\in M_{n-1\times n}(\mathbb Z)$ so that the sum of entries in each row is zero. Prove that $\det(AA^T)=nk^2.$
Jun 9, 2016
answer
5
How do we get the final formula of the Bernoulli number?
Mar 29, 2017
answer
5
Characterization of the quasi-arithmetic mean
Jun 13, 2019
answer
4
Proving Exponential Equations are Equivalent 2
Sep 12, 2018
answer
4
$A_{ij}=i-j$, for $i , j = 1, ..., n$. What is the rank of $A$? ($n\geq 2$).
May 18, 2018
answer
4
Functional Equation of iterations
Jun 9, 2016
answer
4
For an orthogonal matrix $Q$, why does $QQ^T = I$?
Jun 19, 2016

Your privacy

By clicking “Accept all cookies”, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy.