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Bernhard Boehmler
  • Member for 10 years, 9 months
  • Last seen more than a week ago
11 votes
2 answers
2k views

Does the curvature determine the metric?

8 votes
5 answers
2k views

Proving irreducibility of $x^6-72$

7 votes
0 answers
154 views

Can MAGMA compute Auslander-Reiten sequences in group algebras?

5 votes
1 answer
484 views

Special formula for the permanent of the sum of two matrices

5 votes
1 answer
95 views

Is there an OpenSource CAS compatible with GAP where relatively fast computation of Hom$_{kG}(M,N)$ over "large" finite fields is possible?

5 votes
1 answer
137 views

How to construct submodules with GAP / MeatAxe?

4 votes
0 answers
104 views

MAGMA-question concerning the transformation of a $kG$-module $M$ into a right ideal of the group algebra

4 votes
0 answers
547 views

Does the curvature determine the metric for all surfaces

4 votes
1 answer
182 views

Question concerning the GAP package qpa (find all ideals with a certain property)

4 votes
1 answer
310 views

Non-central conjugacy class sizes in non-abelian groups of odd order

3 votes
0 answers
669 views

Correspondence between summands of a module and primitive idempotents of the endomorphism ring of the module

3 votes
0 answers
61 views

Can MAGMA compute pullbacks of $kG$-modules?

3 votes
1 answer
151 views

How to distinguish two "almost isomorphic" groups

3 votes
1 answer
113 views

How to construct an explicit isomorphism between two special endomorphism rings

3 votes
0 answers
70 views

How to find the irreducible constituents of a Brauer character with MAGMA?

3 votes
1 answer
51 views

How to extend scalars of a MeatAxe $kG$-module $M$ given in GAP?

2 votes
1 answer
62 views

Given an indecomposable $kG$-module $M$, can MAGMA compute a minimal projective cover of $M$?

2 votes
1 answer
115 views

How to do inflation of $k(G/N)$-modules with MAGMA?

2 votes
1 answer
95 views

MAGMA-question concerning the multiplicity of indecomposable $kG$-modules in a decomposable $kG$-module

2 votes
0 answers
46 views

Does MAGMA automatically identify $G$ and $G^\text{op}$?

2 votes
2 answers
96 views

Compute the values of two infinite products whose factors are the same

2 votes
1 answer
177 views

Question about matrix multiplication

2 votes
1 answer
94 views

Differentiable map conserving geodetic lines which is no isometry

1 vote
1 answer
341 views

Is there a computer programm or CAS (maybe GAP?) that can calculate with projective (indecomposable) A-modules (A is a finite dimensional k-algebra)?

1 vote
1 answer
59 views

Lemma about f.g. abelian groups endowed with a certain bilinear form

1 vote
1 answer
622 views

How to stop a calculation in GAP without closing GAP?

1 vote
1 answer
77 views

Interchanging summands among infinitely many infinite series

1 vote
1 answer
34 views

How to prove a certain inequality for a complex valued function using its derivative?

1 vote
0 answers
39 views

Can GAP find isomorphisms to permutation groups which preserve / have additional properties?

1 vote
1 answer
106 views

Can GAP test, if two ordinary character tables are isomorphic?