User Ali Taghavi

24 votes

Examples of common false beliefs in mathematics

answered Nov 12, 2014 at 2:15

17 votes

Generalization of Darboux's Theorem

answered Dec 22, 2013 at 15:49

17 votes

Finding a 1-form adapted to a smooth flow

answered Jul 4, 2017 at 13:30

11 votes

Accepted

Are there vector fields which are gradients with respect to one metric but not another?

answered Jun 3, 2018 at 6:38

11 votes

Accepted

Collection of dense subsets as a "fingerprint" for Hausdorff topologies?

answered Feb 8, 2016 at 10:59

11 votes

Pathology in Complex Analysis

answered Sep 13, 2018 at 7:59

9 votes

Proposals for polymath projects

answered Mar 12, 2017 at 15:14

7 votes

Accepted

A matrix norm inequality II

answered Mar 13, 2017 at 6:07

7 votes

What's a groupoid? What's a good example of a groupoid?

answered Jan 20, 2016 at 19:11

6 votes

Pointwise convergence for continuous functions

answered Feb 3, 2016 at 10:10

6 votes

Ways to prove the fundamental theorem of algebra

answered Oct 6, 2017 at 6:11

4 votes

Classification of $C^*$ algebras whose all non scalar elements have disconnected spectrum

answered Jul 3, 2017 at 10:02

3 votes

Accepted

A question about harmonic function

answered Oct 10, 2017 at 14:27

3 votes

Accepted

Solving a "reversed" Stein equation

answered May 20, 2018 at 7:59

3 votes

Generalization of Curl to higher dimensions

answered Aug 22, 2018 at 22:05

3 votes

Accepted

Can we classify the general linear maps such that for a fixed matrix $A \in M_n(\mathbb R)$ the conjuagation action fixes the first column?

answered Oct 18, 2018 at 10:10

3 votes

Solving algebraic problems with topology

answered Feb 4, 2016 at 9:47

3 votes

Results true in a dimension and false for higher dimensions

answered Aug 8, 2015 at 15:52

3 votes

when constant scalar curvature implies Einstein?

answered Jul 20 at 17:50

2 votes

Is a Riemannian submersion a harmonic map?

answered Sep 9 at 23:13

2 votes

Kaplansky Idempotent conjecture and Extension theory

answered Oct 10, 2019 at 17:44

2 votes

Orbits space of real-analytic planar foliations

answered Feb 26, 2021 at 18:03

2 votes

What are your favorite instructional counterexamples?

answered Feb 3, 2015 at 19:23

2 votes

Unitary factor in polar decompositions

answered Apr 15, 2017 at 19:08

2 votes

Vector field with holomorphic flow

answered May 16, 2017 at 21:23

2 votes

Generalization of winding number to higher dimensions

answered Mar 5, 2019 at 9:05

2 votes

Is this a submanifold?

answered Mar 9, 2019 at 20:36

2 votes

A complex limit cycle not intersecting the real plane

answered Apr 9, 2019 at 15:23

2 votes

Is the linear span of special orthogonal matrices equal to the whole space of $N\times N$ matrices?

answered Sep 11, 2018 at 17:21

2 votes

A vector space associated with a vector field on a symplectic manifold

answered Jun 19, 2018 at 12:05

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56 Answers

Examples of common false beliefs in mathematics

Generalization of Darboux's Theorem

Finding a 1-form adapted to a smooth flow

Are there vector fields which are gradients with respect to one metric but not another?

Collection of dense subsets as a "fingerprint" for Hausdorff topologies?

Pathology in Complex Analysis

Proposals for polymath projects

A matrix norm inequality II

What's a groupoid? What's a good example of a groupoid?

Pointwise convergence for continuous functions

Ways to prove the fundamental theorem of algebra

Classification of $C^*$ algebras whose all non scalar elements have disconnected spectrum

A question about harmonic function

Solving a "reversed" Stein equation

Generalization of Curl to higher dimensions

Can we classify the general linear maps such that for a fixed matrix $A \in M_n(\mathbb R)$ the conjuagation action fixes the first column?

Solving algebraic problems with topology

Results true in a dimension and false for higher dimensions

when constant scalar curvature implies Einstein?

Is a Riemannian submersion a harmonic map?

Kaplansky Idempotent conjecture and Extension theory

Orbits space of real-analytic planar foliations

What are your favorite instructional counterexamples?

Unitary factor in polar decompositions

Vector field with holomorphic flow

Generalization of winding number to higher dimensions

Is this a submanifold?

A complex limit cycle not intersecting the real plane

Is the linear span of special orthogonal matrices equal to the whole space of $N\times N$ matrices?

A vector space associated with a vector field on a symplectic manifold