Martin Brandenburg's user avatar
Martin Brandenburg's user avatar
Martin Brandenburg's user avatar
Martin Brandenburg
  • Member for 14 years, 3 months
  • Last seen more than a month ago
  • Berlin, Germany
5 votes
4 answers
831 views

projections of finitely presented groups

5 votes
4 answers
1k views

What about the empty torsor?

5 votes
1 answer
766 views

K-Theory as a special $\lambda$-ring

5 votes
2 answers
910 views

Realize a homomorphism $\mathcal{C}(X) \to \mathbb{R}$ as an evaluation

5 votes
1 answer
360 views

Center of the category of special $\lambda$-rings

5 votes
0 answers
268 views

Cocontinuous monadic functors

5 votes
2 answers
586 views

Basics(?) about quasi-coherent modules on projective schemes

5 votes
2 answers
2k views

Exact sequences of pointed sets - two definitions

5 votes
1 answer
556 views

Two questions about total categories

5 votes
2 answers
503 views

Free cocommutative commutative Hopf monoids

5 votes
1 answer
406 views

Unitalization internal to monoidal categories

5 votes
3 answers
1k views

Künneth formula for Ext groups

5 votes
1 answer
202 views

Dense subcategory of measurable spaces

5 votes
1 answer
318 views

Diagonal of a diagram of codescent objects

5 votes
0 answers
190 views

Open pushout stability

5 votes
1 answer
280 views

The closure of cyclic modules under direct sums and direct summands

5 votes
1 answer
473 views

Classification of the quotients of the ring Z/4 [X]

5 votes
1 answer
337 views

Does the category of integral domains admit a symmetric monoidal structure?

5 votes
2 answers
386 views

Algebra with three anti-commutator relations

5 votes
1 answer
413 views

Classification of natural endomorphisms on finite groups

4 votes
1 answer
328 views

GCD in $\mathbb{F}_3[T]$ with powers of linear polynomials

4 votes
2 answers
277 views

Free augmented algebras

4 votes
2 answers
179 views

Reference request: "Tangent relation" in metric spaces

4 votes
1 answer
244 views

Example of a non-cocomplete model category of a realized limit sketch

4 votes
1 answer
492 views

Etale cohomology and Kummer theory

4 votes
1 answer
444 views

Example of a non-closed cocomplete symmetric monoidal category

4 votes
0 answers
227 views

Quasi-coherent module of (global) finite presentation

4 votes
1 answer
582 views

Notation: Categories of measur(abl)e spaces

4 votes
2 answers
352 views

Canonical presentation of pro-modules over pro-rings

4 votes
1 answer
324 views

Reference for "multi-monoidal categories"