Amit Kumar Gupta's user avatar
Amit Kumar Gupta's user avatar
Amit Kumar Gupta's user avatar
Amit Kumar Gupta
  • Member for 13 years, 8 months
  • Last seen more than a month ago
45 votes
4 answers
8k views

Does the fact that this vector space is not isomorphic to its double-dual require choice?

45 votes
12 answers
20k views

Teaching undergraduate students to write proofs

32 votes
3 answers
5k views

Should there be a true model of set theory?

21 votes
5 answers
4k views

How much of ZFC does Quine's New Foundations prove?

16 votes
4 answers
2k views

Is every p-point ultrafilter Ramsey?

13 votes
1 answer
535 views

Is the set of cube-free binary sequences perfect?

11 votes
5 answers
4k views

Reference letters for teaching positions

9 votes
2 answers
781 views

Why is this theorem (about $L(P(\omega_1))^V$ and $L(P(\omega_1))^{V[G]}$) nice?

9 votes
2 answers
1k views

Given a cardinal k, what's the biggest dense linear order with a dense subset of size k?

9 votes
2 answers
954 views

What is the consistency strength of the failure of square, in terms of large cardinals

8 votes
1 answer
407 views

Decomposing posets into countably many chains

8 votes
2 answers
822 views

Statements forced by one condition of a poset, but not the whole thing

7 votes
3 answers
1k views

Characterizing forcings that don't add any dominating reals

6 votes
0 answers
400 views

PFA and the compactness/incompactness of $\omega_2$

6 votes
1 answer
221 views

Bounds on $\max \mathrm{pcf}(A)$ if $\Pi A$ is big

5 votes
1 answer
550 views

Generalizations of pcf theory

5 votes
0 answers
296 views

A question about the canonical constructible square sequence

5 votes
1 answer
451 views

Normal measures on $P_{\kappa }(\lambda )$ extend the club filter

5 votes
1 answer
416 views

Does a generic normal measure extend the club filter?

5 votes
1 answer
744 views

If $0^{\sharp}$ exists, then every uncountable cardinal in $V$ is as large as it can be in $L$.

4 votes
1 answer
229 views

Decomposing a poset into directed subposets

4 votes
1 answer
614 views

Strong Cardinals and Supercompact Cardinals

3 votes
2 answers
675 views

A problem about posets similar to Suslin's problem

3 votes
1 answer
220 views

A question about 0# and truth in levels of the L hierarchy