User Mikhail Katz

4 votes

Accepted

Obstructions for vector fields to be gradient fields of a fixed function

answered Jun 26, 2018 at 11:42

4 votes

Modern references to Brill-Noether theory on curves?

answered Jun 14, 2023 at 16:50

4 votes

Homological class of the fiber in the total space of the one circle bundle

answered Jun 26, 2018 at 14:47

4 votes

Continuity of a rational function

answered Jul 5, 2023 at 9:01

4 votes

How big can a wedge of $n$ 2-forms in $\mathbb{R}^{2n}$ be?

answered Jun 18, 2023 at 16:14

4 votes

Twice continuously differentiable implied by existence of limit

answered Oct 25, 2023 at 14:51

3 votes

Is this entire function a square?

answered Jul 11, 2023 at 12:49

3 votes

Flat metrics on $n$-toruses, their systoles, and the "shortest vector problem"

answered Jun 7, 2018 at 16:16

3 votes

Accepted

Convexity of set of normal directions in a CAT(0)-space

answered May 24, 2018 at 13:51

3 votes

Comparative analysis of history of mathematics

answered Aug 12, 2023 at 20:05

3 votes

How to be a Great mathematician in prison/without a master?

answered Apr 25, 2017 at 11:24

3 votes

Zone of negative curvature on surfaces embedded in $\mathbb{R}^3$

answered Jul 10, 2017 at 15:12

3 votes

Euler's mathematics in terms of modern theories?

answered May 3, 2016 at 7:41

3 votes

Smallest solution to $x^2 \equiv x\pmod{n}$

answered Jun 20, 2016 at 12:31

3 votes

Topological properties via properties continuous maps

answered Jun 22, 2016 at 9:15

3 votes

What is an example of an orbifold which is not a topological manifold?

answered Mar 8, 2016 at 9:57

3 votes

Explaining the concept of projective space: notes for students

answered Apr 4, 2013 at 13:27

3 votes

Accepted

Fixing a proof of the systolic inequality for higher genus surfaces

answered Apr 9, 2013 at 11:00

3 votes

geometric interpretation of Lie bracket

answered Apr 17, 2013 at 8:19

3 votes

Accepted

Strong equivalence between intrinsic and extrinsic metrics on $GL_n^+$?

answered Dec 29, 2015 at 15:05

2 votes

Are all ideals $I$ in the ring of smooth functions on a compact manifold M equal to a set of smooth functions that vanish in $Z \subset M$?

answered Jan 13, 2016 at 12:46

2 votes

On convergence of convex bodies

answered Jan 4, 2016 at 8:19

2 votes

Why do we teach calculus students the derivative as a limit?

answered Dec 22, 2014 at 11:45

2 votes

Which universities teach true infinitesimal calculus?

answered Dec 28, 2014 at 12:20

2 votes

Thurston geometries---the geometry of the universal cover of $SL(2, \mathbb{R})$

answered Dec 7, 2015 at 19:34

2 votes

Analogues of P vs. NP in the history of mathematics

answered Mar 14, 2014 at 9:02

2 votes

Why can an infinite-order polynomial be written as the ratio of two finite-order polynomials?

answered Apr 18, 2013 at 16:20

2 votes

Was Desargues more an Euclid or an Eudoxos?

answered Apr 12, 2013 at 8:47

2 votes

Non-ZFC set theory and nonuniqueness of the hyperreals: problem solved?

answered Apr 11, 2013 at 12:02

2 votes

How helpful is non-standard analysis?

answered Apr 8, 2013 at 9:53

Stack Exchange Network

184 Answers

Obstructions for vector fields to be gradient fields of a fixed function

Modern references to Brill-Noether theory on curves?

Homological class of the fiber in the total space of the one circle bundle

Continuity of a rational function

How big can a wedge of $n$ 2-forms in $\mathbb{R}^{2n}$ be?

Twice continuously differentiable implied by existence of limit

Is this entire function a square?

Flat metrics on $n$-toruses, their systoles, and the "shortest vector problem"

Convexity of set of normal directions in a CAT(0)-space

Comparative analysis of history of mathematics

How to be a Great mathematician in prison/without a master?

Zone of negative curvature on surfaces embedded in $\mathbb{R}^3$

Euler's mathematics in terms of modern theories?

Smallest solution to $x^2 \equiv x\pmod{n}$

Topological properties via properties continuous maps

What is an example of an orbifold which is not a topological manifold?

Explaining the concept of projective space: notes for students

Fixing a proof of the systolic inequality for higher genus surfaces

geometric interpretation of Lie bracket

Strong equivalence between intrinsic and extrinsic metrics on $GL_n^+$?

Are all ideals $I$ in the ring of smooth functions on a compact manifold M equal to a set of smooth functions that vanish in $Z \subset M$?

On convergence of convex bodies

Why do we teach calculus students the derivative as a limit?

Which universities teach true infinitesimal calculus?

Thurston geometries---the geometry of the universal cover of $SL(2, \mathbb{R})$

Analogues of P vs. NP in the history of mathematics

Why can an infinite-order polynomial be written as the ratio of two finite-order polynomials?

Was Desargues more an Euclid or an Eudoxos?

Non-ZFC set theory and nonuniqueness of the hyperreals: problem solved?

How helpful is non-standard analysis?