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Andrey Rekalo's user avatar
Andrey Rekalo's user avatar
Andrey Rekalo's user avatar
Andrey Rekalo
  • Member for 14 years
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157 Answers

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9 votes

How to "globalize" the inverse function theorem?

9 votes

PDEs as a tool in other domains in mathematics

9 votes
Accepted

Holomorphic function with a.e. vanishing radial boundary limits

9 votes
Accepted

Nice applications of the spectral theorem?

9 votes

Stronger version of the isoperimetric inequality

9 votes

Distributions more complicated than the Dirac δ and derivatives

8 votes
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Dirichlet series expansion of an analytic function

8 votes

Reference for complex analysis jargon

8 votes
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Fibonacci = Leonardo Pisano?

7 votes
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Decay of the Fourier transform

7 votes
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Quantitative Weierstraß approximation

7 votes

Euclid with Birkhoff

7 votes
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Approximation by exponential polynomials

7 votes

Area of cross-section (at midpoint perpendicular to longest diagonal) in the unit cube of dimension N

7 votes

Smooth dependence of ODEs on initial conditions

7 votes

Looking for an interesting problem/riddle involving triple integrals.

6 votes

Why does undergraduate discrete math require calculus?

6 votes
Accepted

Föllmer: "Calcul d'Ito sans probabilités" in English or German?

6 votes
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A simple infinite dimensional optimization problem

6 votes
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Connection between the Hodge laplacian and the Laplace operator

6 votes
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Why are two notions of Gaussian curvature are the same - what is the simplest & most didactic proof?

6 votes

Is Conway's base-13 function measurable?

6 votes

Unpopular "elementary" theorems/identities to impress an audience of mathematicians.

6 votes

Individual mathematical objects whose study amounts to a (sub)discipline?

6 votes

What is the right citation for the power iteration method to find eigenvalues?

5 votes

Fourier transform of fractional differential operator and Plancherel formula equivalent for fractional norms

5 votes

Local linearization of ODE at singular point

5 votes
Accepted

Rolling a convex body: Geodesics vs. rolling curves

5 votes

A question about the Kakeya problem

5 votes
Accepted

Linear transformation takes a polygon to another one.