Nażysław Zbyłutowicz
  • Member for 4 years, 11 months
  • Last seen more than 4 years ago
  • XI centry Poland
2 answers
6 votes
475 views
1 bookmarks
are there any matrices that act like the identity matrix but are totally different?
1 answers
5 votes
2k views
1 bookmarks
How to derive the character table for $D_4$?
3 answers
3 votes
379 views
Show, without invoking the Pythagorean theorem, that the $3-4-5$ triangle is right
2 answers
3 votes
346 views
What is the meaning of the $\vdash$ symbol?
4 answers
3 votes
926 views
$\mathbb{R}$ under the metric $|\tan^{-1}x - \tan^{-1}y|$
1 answers
3 votes
117 views
1 bookmarks
what information is encoded in a Jordan block matrix?
2 answers
3 votes
466 views
Piecewise continuous vs. continuous
1 answers
2 votes
796 views
How do Specht modules give us the irreducible representations of $S_n$?
2 answers
2 votes
222 views
is this sequence Cauchy in the Banach space of continuous functions with infinity norm?
1 answers
2 votes
159 views
if $G$ is a finite group, can we put a bound on the dimension of its irreducible representations?
1 answers
2 votes
56 views
is it possible to categorize all subspaces of a given vector space?
0 answers
2 votes
102 views
do all vector spaces function under ordinary component wise addition?
1 answers
2 votes
73 views
a Fourier series question
1 answers
1 votes
39 views
Is it always true that if $A = \int_a^b f(x) dx$ then $A - c = \int_a^b (f(x) -c) dx$?
3 answers
1 votes
42 views
Trig identity question relating to maximum value on an interval: $\max |\sin nx-\cos nx| = \sqrt2\max |\sin(nx-\frac\pi2)|$
1 answers
1 votes
109 views
is $T = \frac{d}{dx}$ continuous on the space of continuously differentiable functions on an interval?
1 answers
1 votes
30 views
showing that a sequence of functions is Cauchy, in a normed space.
1 answers
1 votes
43 views
equivalency of the infinity norm and the $p = 1$ norm in $\mathbb{R}^n$
0 answers
1 votes
78 views
Column stabilizers of a Young tableaux (Rep. theory)
1 answers
1 votes
92 views
How was $[T]_{\beta}$ computed here? (change of basis and linear transformations)
2 answers
1 votes
706 views
Figuring out nilpotent $2 \times 2$ matrices
2 answers
1 votes
416 views
Jordan canonical form of a matrix $A$ with the property that $A^2 = 0$?
0 answers
1 votes
153 views
Cauchy Integral Formula (what to do when singularities are on the boundary?)
2 answers
1 votes
44 views
showing that $|x-y|^k$ is a metric on $\mathbb{R}$ for $k \in (0, 1)$
2 answers
1 votes
425 views
1 bookmarks
Given a square matrix $A$, find an invertible matrix $S$ such that $S^{-1}AS = J_A$
0 answers
1 votes
94 views
1 bookmarks
given a finite group $G$, is it possible to determine the exact number of one-dimensional representations of $G$
1 answers
1 votes
213 views
can we have disjoint ideals in the same ring?
0 answers
1 votes
39 views
what is going on in this map: $\phi: G \rightarrow GL(V)$?
2 answers
1 votes
1k views
2 bookmarks
what is the dimension of $\wedge^k(V)$?
0 answers
1 votes
120 views
what do the elements of the kth exterior power vector space look like?