User PseudoNeo

6 votes

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Finding my mistake in a "proof" that there is no non-trivial knot

answered Jan 28, 2021 at 20:13

6 votes

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Books about braid theory

answered May 5, 2015 at 12:51

6 votes

Existence of an holomorphic function

answered Mar 11, 2015 at 8:32

6 votes

connected sums of closed orientable manifold is orientable

answered Jul 7, 2011 at 10:41

6 votes

What is the sequence (1, 7, 2, 22, 3, 11, 4, ...)?

answered May 6, 2011 at 0:07

6 votes

Why this is a covering map between compact Riemann surfaces?

answered Jul 26, 2012 at 12:09

5 votes

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Galois covers of Riemann surfaces

answered Feb 24, 2012 at 19:52

5 votes

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Conformal map from punctured disc to disc

answered Aug 23, 2012 at 11:23

5 votes

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Universal covers and homotopy

answered Aug 24, 2012 at 15:05

5 votes

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Is 2x (360°) rotated (orientable) Möbius band homeomorphic to $S^1\times[0,1]$?

answered Jul 5, 2011 at 17:53

5 votes

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Parallelisable three dimensional orientable manifolds and Stiefel's theorem

answered Sep 8, 2015 at 17:02

5 votes

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Why this polynomial is irreducible?

answered Feb 5, 2013 at 18:05

5 votes

Algebraic numbers expressible in terms of real-valued radicals

answered Jan 18, 2018 at 23:24

5 votes

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Does the sum of reciprocals of this subset of the primes converge?

answered Jul 29, 2016 at 23:36

4 votes

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What algebra is generated by $\mathrm{O}(2)$?

answered Jul 25, 2016 at 9:59

4 votes

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Notation for representing ANY number?

answered Jul 14, 2016 at 13:54

4 votes

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Smooth diffeomorphism and $C^1$ diffeomorphism

answered Oct 15, 2015 at 14:53

4 votes

on the continuum hypothesis: only finitely many cardinals between $\aleph_0$ and $2^{\aleph_0}$

answered Oct 16, 2015 at 16:22

4 votes

Non-zero matrices are left and right zero divisors

answered Sep 9, 2015 at 17:26

4 votes

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What does a finite extension look like?

answered Jul 13, 2016 at 9:42

4 votes

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Irreducible reps of $U(3,p)$

answered Jul 31, 2019 at 23:01

4 votes

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Proving Two Complexes are Not Quasi-Isomorphic

answered Apr 26, 2013 at 2:35

4 votes

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vector bundles on the affine line over a PID

answered Feb 5, 2013 at 10:16

4 votes

$F$ closed and connected then...

answered Aug 14, 2012 at 22:23

4 votes

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Real vector bundles on $S^{7}$

answered Sep 2, 2014 at 16:20

4 votes

Binomial coefficients identity: $\sum i \binom{n-i}{k-1}=\binom{n+1}{k+1}$

answered Jan 8, 2015 at 15:24

4 votes

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restrictions on the fundamental group of a knot complement?

answered Mar 1, 2011 at 22:26

4 votes

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Question about extended complex plane

answered Mar 23, 2012 at 0:08

3 votes

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Quotient of free group with normal subgroup

answered Jul 7, 2011 at 10:31

3 votes

Which mapping tori are Seifert manifolds?

answered Aug 16, 2011 at 13:38

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119 Answers

Finding my mistake in a "proof" that there is no non-trivial knot

Books about braid theory

Existence of an holomorphic function

connected sums of closed orientable manifold is orientable

What is the sequence (1, 7, 2, 22, 3, 11, 4, ...)?

Why this is a covering map between compact Riemann surfaces?

Galois covers of Riemann surfaces

Conformal map from punctured disc to disc

Universal covers and homotopy

Is 2x (360°) rotated (orientable) Möbius band homeomorphic to $S^1\times[0,1]$?

Parallelisable three dimensional orientable manifolds and Stiefel's theorem

Why this polynomial is irreducible?

Algebraic numbers expressible in terms of real-valued radicals

Does the sum of reciprocals of this subset of the primes converge?

What algebra is generated by $\mathrm{O}(2)$?

Notation for representing ANY number?

Smooth diffeomorphism and $C^1$ diffeomorphism

on the continuum hypothesis: only finitely many cardinals between $\aleph_0$ and $2^{\aleph_0}$

Non-zero matrices are left and right zero divisors

What does a finite extension look like?

Irreducible reps of $U(3,p)$

Proving Two Complexes are Not Quasi-Isomorphic

vector bundles on the affine line over a PID

$F$ closed and connected then...

Real vector bundles on $S^{7}$

Binomial coefficients identity: $\sum i \binom{n-i}{k-1}=\binom{n+1}{k+1}$

restrictions on the fundamental group of a knot complement?

Question about extended complex plane

Quotient of free group with normal subgroup

Which mapping tori are Seifert manifolds?