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Ralph's user avatar
Ralph's user avatar
Ralph
  • Member for 13 years, 5 months
  • Last seen more than 9 years ago
6 votes
4 answers
1k views

Number of integer combinations $x_1 < \cdots < x_n$?

8 votes
5 answers
1k views

Additive integer-valued functions on the module category

5 votes
0 answers
584 views

Inverse limit of graded rings

42 votes
4 answers
8k views

Verifying the correctness of a Sudoku solution

11 votes
1 answer
772 views

Is the dual of the product of infinite cyclic groups a free abelian group ?

5 votes
0 answers
889 views

Height of maximal homogeneous ideals

28 votes
1 answer
850 views

Is there a Kan-Thurston theorem for fibrations ?

1 vote
1 answer
468 views

Fixed points of the Borel-Serre compactification

8 votes
3 answers
1k views

Is this long sequence of Hom's exact ?

9 votes
1 answer
472 views

Geometric interpretation of integrals of coordinate rings

5 votes
1 answer
621 views

Group actions with finite stabilizers and compact quotients

14 votes
4 answers
2k views

Applications of Govorov-Lazard Theorem?

5 votes
0 answers
647 views

Do exact functors commute with spectral sequences ?

15 votes
2 answers
1k views

Categories where projective objects are flat

8 votes
0 answers
222 views

Depth for non-commutative rings

5 votes
1 answer
411 views

Is this height-transcendence-degree inequality true without AC ?

6 votes
1 answer
275 views

Is there a local-global principle for integral Laurent series ?

4 votes
0 answers
144 views

Is a *complete ring complete in the graded category ?

10 votes
1 answer
1k views

Minimal number of cells of a CW complex (up to homotopy)

3 votes
1 answer
532 views

1-boundaries of a CW-complex

1 vote
0 answers
216 views

Loops in CW-complexes and the 2-skeleton

5 votes
1 answer
326 views

Free left = free right ?

10 votes
1 answer
549 views

Fibrations with isomorphic Leray-Serre spectral sequences and non-isomorphic cohomology ?

15 votes
0 answers
698 views

Bloch-Kato conjecture and Wiles' numerical criterion

8 votes
4 answers
782 views

Is the Brauer correspondence injective ?

10 votes
2 answers
425 views

Classifying space of the unit circle of a valued field

12 votes
2 answers
712 views

Classifying spaces of a profinite groups

6 votes
0 answers
275 views

Applications of coclass theory

7 votes
1 answer
731 views

Nilpotency degree of the augmentation ideal

20 votes
1 answer
955 views

Which spaces are characterized by functions with compact support ?