Thomas Klimpel's user avatar
Thomas Klimpel's user avatar
Thomas Klimpel's user avatar
Thomas Klimpel
  • Member for 12 years, 9 months
  • Last seen this week
2 votes
3 answers
453 views

Weak categoricity in first order logic

4 votes
0 answers
145 views

Is the universal inverse semigroup of a commutative semigroup an embedding?

1 vote
1 answer
408 views

Equivalence of sequences and subsets of natural numbers

9 votes
2 answers
5k views

What is the "common" definition of model in first order logic?

5 votes
2 answers
399 views

What is the smallest variety of algebras containing all fields?

8 votes
1 answer
1k views

Correspondence of countably generated $\sigma$-algebra and second-countable space

6 votes
1 answer
140 views

Uniqueness of compact topology for a group

2 votes
2 answers
484 views

Existence of universal enveloping inverse semigroup (similar to "Grothendieck group")

3 votes
0 answers
230 views

Constructing a semigroup from a small category

8 votes
2 answers
613 views

Can non-unital rings be replaced by R-algebras?

7 votes
0 answers
932 views

Classifications of finite nilpotent groups

5 votes
2 answers
3k views

Are measurable functions closed under addition and multiplication, but not composition?

7 votes
2 answers
903 views

Is there a useful definition of minors for digraphs?

4 votes
0 answers
2k views

Convergence of Gauss-Newton method for piecewise linear functions

13 votes
2 answers
2k views

Is the product of ideals commutative?

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