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5 votes
2 answers
132 views

Extending polynomial hierarchy above $\omega$

0 votes
0 answers
5 views

Nodal domain theorem for clamped plate equation

2 votes
0 answers
92 views

Cohomology of representation varieties and the Hochschild cohomology

17 votes
3 answers
2k views

Optimal 8-vertex isoperimetric polyhedron?

0 votes
0 answers
19 views

Higher-order obstructions in thin group orbits

10 votes
1 answer
201 views

Magic-square type arrangement of rational numbers in $(0, 1)$ on $\mathbb Z\oplus\mathbb Z$

5 votes
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138 views

When is a Function a Flow

0 votes
1 answer
45 views

Expectation of supremum of sub gaussians

7 votes
1 answer
150 views

Random pro-p groups via iterated uniformly random central extensions

3 votes
0 answers
49 views

An inequality involving integer partitions

13 votes
2 answers
1k views

Integers $d$ for which the negative Pell equation is soluble for both $d$ and $2d$?

1 vote
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52 views

Representing partition numbers as the antidiagonal sums of terms with linear recurrences based on $(1+x-x^2)^n$

29 votes
3 answers
1k views

How many natural operations on subsets are there?

2 votes
2 answers
281 views

Krull dimension in non-algebraically closed fields

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