User Andrey Rekalo

134 votes

Interpreting the Famous Five equation

answered Jun 5, 2010 at 3:05

94 votes

Elementary + short + useful

answered Apr 3, 2011 at 17:44

88 votes

Suggestions for good notation

answered Oct 21, 2010 at 3:37

70 votes

Accepted

Why do we care about $L^p$ spaces besides $p = 1$, $p = 2$, and $p = \infty$?

answered Jun 14, 2010 at 18:22

69 votes

Accepted

Determinant of sum of positive definite matrices

answered May 19, 2011 at 12:54

60 votes

Accepted

Applications of mathematics

answered Feb 24, 2011 at 19:44

56 votes

Accepted

Can we cover the unit square by these rectangles?

answered Aug 1, 2010 at 20:25

52 votes

Accepted

Geometric interpretation of the half-derivative?

answered Jan 4, 2014 at 4:07

47 votes

Accepted

Is the "Napkin conjecture" open? (origami)

answered Nov 21, 2010 at 21:56

46 votes

Counterexamples in PDE

answered Jun 24, 2011 at 7:41

42 votes

Accepted

Nonexistence of boundary between convergent and divergent series?

answered Dec 14, 2010 at 20:31

36 votes

Accepted

What does the word "symplectic" mean?

answered Nov 7, 2010 at 11:51

32 votes

Accepted

Are there smooth bodies of constant width?

answered Feb 3, 2011 at 23:23

32 votes

Accepted

Intuition and/or visualisation of Itô integral/Itô's lemma

answered Jun 28, 2010 at 15:00

31 votes

Establishing zeta(3) as a definite integral and its computation.

answered Jul 6, 2010 at 15:17

29 votes

Accepted

Parabolic envelope of fireworks

answered Jul 3, 2010 at 13:11

29 votes

Accepted

On the non-rigorous calculations of the trajectories in the moon landings

answered Jan 19, 2011 at 8:49

29 votes

Accepted

How did Bernoulli prove L'Hôpital's rule?

answered Jan 10, 2011 at 20:24

28 votes

Abstract thought vs calculation

answered Jul 1, 2010 at 20:02

27 votes

Examples of common false beliefs in mathematics

answered Aug 4, 2010 at 22:29

26 votes

Accepted

What was Weierstrass's counterexample to the Dirichlet Principle?

answered Oct 14, 2010 at 18:44

26 votes

What are some correct results discovered with incorrect (or no) proofs?

answered Nov 14, 2010 at 14:18

26 votes

Accepted

Is this number already known to be transcendental? Is there a survey about up-to-date trascendence results?

answered Feb 14, 2011 at 11:37

26 votes

Accepted

Which Fréchet spaces have a dual that is a Fréchet space?

answered Apr 29, 2011 at 7:34

25 votes

Polynomials having a common root with their derivatives

answered Jun 11, 2010 at 20:27

24 votes

What are some correct results discovered with incorrect (or no) proofs?

answered Jun 11, 2010 at 0:44

24 votes

Why are differential forms called closed and exact?

answered Dec 6, 2010 at 22:21

23 votes

Are there other nice math books close to the style of Tristan Needham?

answered Jul 14, 2010 at 18:10

22 votes

Nontrivial question about Fibonacci numbers?

answered Dec 5, 2010 at 9:50

22 votes

Accepted

When I can safely assume that a function is a Laplace transform of other function?

answered Nov 5, 2010 at 19:35

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157 Answers

Interpreting the Famous Five equation

Elementary + short + useful

Suggestions for good notation

Why do we care about $L^p$ spaces besides $p = 1$, $p = 2$, and $p = \infty$?

Determinant of sum of positive definite matrices

Applications of mathematics

Can we cover the unit square by these rectangles?

Geometric interpretation of the half-derivative?

Is the "Napkin conjecture" open? (origami)

Counterexamples in PDE

Nonexistence of boundary between convergent and divergent series?

What does the word "symplectic" mean?

Are there smooth bodies of constant width?

Intuition and/or visualisation of Itô integral/Itô's lemma

Establishing zeta(3) as a definite integral and its computation.

Parabolic envelope of fireworks

On the non-rigorous calculations of the trajectories in the moon landings

How did Bernoulli prove L'Hôpital's rule?

Abstract thought vs calculation

Examples of common false beliefs in mathematics

What was Weierstrass's counterexample to the Dirichlet Principle?

What are some correct results discovered with incorrect (or no) proofs?

Is this number already known to be transcendental? Is there a survey about up-to-date trascendence results?

Which Fréchet spaces have a dual that is a Fréchet space?

Polynomials having a common root with their derivatives

What are some correct results discovered with incorrect (or no) proofs?

Why are differential forms called closed and exact?

Are there other nice math books close to the style of Tristan Needham?

Nontrivial question about Fibonacci numbers?

When I can safely assume that a function is a Laplace transform of other function?