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It'sMe
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60 votes
10 answers
12k views

What do you do when you're stuck?

6 votes
1 answer
307 views

Prove that $\overline{a}_{11}$ is a prime element in $R$

5 votes
0 answers
347 views

What representation theoretic properties does the semi-invariant ring tell us?

4 votes
2 answers
847 views

Research topics in representation theory of algebras [closed]

4 votes
0 answers
232 views

Road map for learning cluster algebras

3 votes
4 answers
723 views

$R$ is a UFD iff $R_{\frak{m}}$ is a UFD?

3 votes
2 answers
375 views

Cohen-Macaulay Representations

3 votes
0 answers
101 views

Example of an irreducible component with an open set of infinitely many codimension 2 (codimension 3) orbits

2 votes
0 answers
157 views

Help with Macaulay2 computation of invariant ring

2 votes
0 answers
118 views

Getting an equivariant morphism

2 votes
0 answers
158 views

How are tangent spaces related via geometric quotient?

2 votes
1 answer
140 views

Rep infinite, but $\tau$-tilting finite

2 votes
0 answers
83 views

Example of a triangular string algebra that is rep infinite, but $\tau$-tilting finite

2 votes
1 answer
216 views

Possible "algebraic" direction in hyperplane arrangements

2 votes
0 answers
170 views

Understanding the proof of a theorem by Van Den Bergh

2 votes
1 answer
172 views

Orbits in the open set given by Rosenlicht's result

2 votes
0 answers
242 views

Understanding a proof of a result of Schofield

1 vote
0 answers
110 views

Prove that $B$ is a directing module

1 vote
0 answers
123 views

Example of a brick-infinite, tame, triangular algebra of global dimension$\geq 3$

1 vote
0 answers
95 views

Is $U\subseteq X^{s}(L)$?

1 vote
0 answers
52 views

Is the Schofield semi invariant defined at $V/IV$?

1 vote
1 answer
144 views

Invariant ring of the subvariety

1 vote
0 answers
122 views

How to determine if an invariant rational function is defined at the $\theta$-polystable point

1 vote
0 answers
134 views

Non-empty stable locus of an irreducible component

1 vote
1 answer
207 views

A result of Schofield in the case of quivers with relations

1 vote
0 answers
258 views

Meaning of "cut out (scheme-theoretically)"

1 vote
0 answers
97 views

Some properties for height 1 prime ideals in the local ring

1 vote
0 answers
130 views

Software for computing invariant rings

1 vote
0 answers
58 views

Structure of tame concealed algebra of Euclidean type

1 vote
0 answers
206 views

Is $\langle\chi,\lambda\rangle=0$, whenever the limit exists? Where is the mistake?