Sergei Akbarov's user avatar
Sergei Akbarov's user avatar
Sergei Akbarov's user avatar
Sergei Akbarov
  • Member for 11 years, 3 months
  • Last seen more than a month ago
  • Moscow, Russia
12 votes
3 answers
1k views

How one should treat M.Kline's "Mathematics. The Loss of Certainty"?

10 votes
2 answers
642 views

Applications of intuitionistic logic

8 votes
1 answer
308 views

Functors, forming a pair "coretraction-retraction", what are they called?

8 votes
1 answer
1k views

Convolution in Hopf algebras

7 votes
0 answers
161 views

Multiplication and division by a morphism under the "inner composition" in closed monoidal categories

6 votes
1 answer
411 views

Does the operation of completion preserve injectivity?

5 votes
1 answer
202 views

Is the algebra of universally integrable functions a von Neumann algebra?

5 votes
0 answers
178 views

Epimorphisms and monomorphisms in the categories of Hopf algebras

5 votes
0 answers
287 views

A "formalistic" variant of the Gödel completeness theorem

4 votes
2 answers
222 views

Topology on the space of universally integrable functions

4 votes
2 answers
262 views

What does the expression "contains arithmetic" in the second Gödel incompletenetss theorem mean exactly?

4 votes
2 answers
412 views

Different definitions of the Grothendieck universe

4 votes
1 answer
259 views

Tannaka duality for closed monoidal categories

4 votes
1 answer
96 views

A class that does not coincide with the class of all sets

4 votes
2 answers
5k views

Two ways of defining rank of a set

4 votes
0 answers
312 views

Is exponential function in a C*-algebra injective on self-adjoint elements?

4 votes
0 answers
1k views

Real form and real structure on a complex Lie group

4 votes
1 answer
112 views

Representation of an oriented manifold as a set of common zeroes of smooth functions

4 votes
2 answers
319 views

Is the category of modules over an abstract monoid enriched?

3 votes
2 answers
196 views

A weaker Hausdorff topology on $\mathbb R$ with different system of compact subsets?

3 votes
1 answer
182 views

C*-algebra of polynomials?

3 votes
1 answer
127 views

Trigonometric polynomials on non-compact and non-abelian groups

3 votes
2 answers
125 views

Full classes in Kelley's book

3 votes
1 answer
374 views

Naive set theory as a first order theory

3 votes
2 answers
455 views

Reference request: where is it written explicitly that the paradoxes of the early 20th century were overcame in the current mathematics?

3 votes
2 answers
458 views

Two types of axiomatic theories in mathematics

2 votes
0 answers
146 views

In which sense the GNS-construction is a functor?

2 votes
1 answer
129 views

Is the unit object in a closed monoidal category always integral?

2 votes
1 answer
134 views

Connection between composition and "inner composition" in closed monoidal categories

2 votes
1 answer
126 views

Is the kernel of an action of a Hopf algebra on an algebra a biideal?