User Michael Renardy

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Probability formula derivation

answered Jun 12, 2011 at 18:59

6 votes

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Addition of essentially self-adjoint operators

answered Jun 4, 2011 at 7:34

6 votes

Most memorable titles

answered Dec 30, 2010 at 23:51

6 votes

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Omega-limit set of the omega-limit set

answered Jan 21, 2011 at 10:53

6 votes

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Can always a family of symmetric real matrices depending smoothly on a real parameter be diagonalized by smooth similarity transformations?

answered Apr 4, 2011 at 13:55

6 votes

Colloquial catchy statements encoding serious mathematics

answered May 8, 2011 at 22:03

5 votes

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Can you control the amplitudes of a finite collection of sine curves just by controlling the amplitude of their superposition?

answered Jun 3, 2011 at 15:21

5 votes

Is Grothendieck a computer?

answered Dec 10, 2010 at 18:42

5 votes

Logarithm of a matrix

answered Jun 5, 2011 at 22:37

5 votes

Generalized Gauss-Green theorem

answered Jun 7, 2011 at 23:13

5 votes

A Poincaré-type inequality with logarithmic function

answered Jan 16, 2014 at 15:47

5 votes

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Find sufficient and necessary conditions on $f$ in which the level curve $f(x,y)=0$ implies only one case $x=a$ for all real $y$

answered Mar 29, 2014 at 15:27

5 votes

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Can a monotone exponentially decreasing function be uniformely approximated bt Gaussians?

answered Sep 8, 2014 at 19:17

5 votes

Limit of a double integral

answered Aug 22, 2013 at 14:59

5 votes

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System of quadratic equations with 18 unknown

answered Jun 7, 2013 at 4:30

5 votes

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"Generators" of one-parameter groups of isometries

answered Jul 26, 2013 at 14:08

5 votes

Variation on the Sobolev space $H^1_0$

answered Sep 29, 2013 at 15:16

5 votes

Selection problem in a collection of non-empty sets

answered Jan 11, 2016 at 9:32

5 votes

Why $M_1 \subset M_2 \not \Rightarrow N_{M_1} (\lambda) \leq N_{M_2} (\lambda)$ for eigenvalue problem? (EDIT)

answered Jun 14, 2016 at 8:08

5 votes

Uniqueness of minimizers in a problem in the Calculus of Variations - Part II

answered Jan 17, 2019 at 2:06

5 votes

Linear transport equation with unbounded coefficients

answered Jul 18, 2021 at 17:09

5 votes

Solution to simple non-autonomous ODE

answered Apr 12, 2021 at 14:30

4 votes

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Find $f:\mathbb R^3 \to \mathbb R$ s.t. $(f - 1)\Delta f + f^2 = 0$?

answered Dec 30, 2022 at 3:15

4 votes

Non-constant-coefficient second-order linear ODE

answered Feb 2, 2022 at 21:34

4 votes

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Asymptotic behavior of maximum of bessel function

answered May 28, 2020 at 3:14

4 votes

A smooth function such that the second derivative of its absolute value is a distribution of positive order

answered May 27, 2021 at 18:59

4 votes

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Backward heat equation and forward perturbed heat equation well posed?

answered Mar 10, 2021 at 17:20

4 votes

Intuition for Agmon-Douglis-Nirenberg ellipticity

answered Jan 25 at 20:35

4 votes

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Crandall & Rabinowitz Theorem, bifurcation curves

answered Jul 27, 2017 at 20:39

4 votes

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How to create a function whose harmonic is a sine wave

answered May 17, 2019 at 0:26

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325 Answers

Probability formula derivation

Addition of essentially self-adjoint operators

Most memorable titles

Omega-limit set of the omega-limit set

Can always a family of symmetric real matrices depending smoothly on a real parameter be diagonalized by smooth similarity transformations?

Colloquial catchy statements encoding serious mathematics

Can you control the amplitudes of a finite collection of sine curves just by controlling the amplitude of their superposition?

Is Grothendieck a computer?

Logarithm of a matrix

Generalized Gauss-Green theorem

A Poincaré-type inequality with logarithmic function

Find sufficient and necessary conditions on $f$ in which the level curve $f(x,y)=0$ implies only one case $x=a$ for all real $y$

Can a monotone exponentially decreasing function be uniformely approximated bt Gaussians?

Limit of a double integral

System of quadratic equations with 18 unknown

"Generators" of one-parameter groups of isometries

Variation on the Sobolev space $H^1_0$

Selection problem in a collection of non-empty sets

Why $M_1 \subset M_2 \not \Rightarrow N_{M_1} (\lambda) \leq N_{M_2} (\lambda)$ for eigenvalue problem? (EDIT)

Uniqueness of minimizers in a problem in the Calculus of Variations - Part II

Linear transport equation with unbounded coefficients

Solution to simple non-autonomous ODE

Find $f:\mathbb R^3 \to \mathbb R$ s.t. $(f - 1)\Delta f + f^2 = 0$?

Non-constant-coefficient second-order linear ODE

Asymptotic behavior of maximum of bessel function

A smooth function such that the second derivative of its absolute value is a distribution of positive order

Backward heat equation and forward perturbed heat equation well posed?

Intuition for Agmon-Douglis-Nirenberg ellipticity

Crandall & Rabinowitz Theorem, bifurcation curves

How to create a function whose harmonic is a sine wave