Skip to main content
Mathematics
Matsmir's user avatar
Matsmir's user avatar
Matsmir's user avatar
Matsmir
  • Member for 5 years, 2 months
  • Last seen this week
  • Moscow, Россия
Profile Activity
Stats
3,345
reputation
20k
reached
99
answers
6
questions
Communities
About

Lomonosov MSU post-graduate student

Badges
View all badges
This user doesn’t have any gold badges yet.
7
silver badges
13
bronze badges
Top tags
View all tags
93
Score
42
Posts
40
Posts %
41
Score
17
Posts
16
Posts %
33
Score
12
Posts
11
Posts %
29
Score
15
Posts
14
Posts %
28
Score
10
Posts
10
Posts %
23
Score
7
Posts
7
Posts %
Top posts
View all questions and answers
answer
13
What do you get when you sum over the smaller half of the harmonic series?
Dec 31, 2019
answer
8
"Square-normal" matrices are normal
Jan 5, 2020
answer
7
Does this condition imply isomorphism?
Jan 15, 2020
answer
7
Does the spectrum of a bounded from below self-adjoint operator have a lower bound?
May 3, 2021
answer
7
Topological space which is homeomorphic to its square
Dec 31, 2019
answer
6
Isomorphism of a Banach space on to a Hilbert space
Aug 5
answer
5
Does strong convergence of operators imply pointwise convergence of their unbounded inverses?
Sep 3
answer
5
If each of the coefficient of $f(x) = a_0+a_1x+\cdots+a_nx^n$ is a zero divisor, then $f(x)$ is a zero divisor
Sep 2
answer
5
Let $X \in M_n(\mathbb{C})$. Is the set $S=\{Y \in M_n(\mathbb{C}) : X \sim Y\}$ closed?
Jul 30
answer
5
How can I show that $\|\,|A|\,|A^*|\,\|=\|A^2\|$?
Jul 28