User Bazin

41 votes

Motivation for and history of pseudo-differential operators

answered May 21, 2012 at 21:43

28 votes

Does Physics need non-analytic smooth functions?

answered Nov 26, 2012 at 21:55

22 votes

Pullback measures

answered Feb 23, 2013 at 14:04

11 votes

Accepted

Fourier Coefficients and Hölder Continuity

answered Jan 30, 2013 at 20:29

10 votes

Accepted

Analyticity of $fg$ with $f$ and $g$ smooth on $\mathbb{R}$ and analytic on $\mathbb{R}^$

answered Jul 4 at 9:46

9 votes

Accepted

Fourier transform in $L^1$?

answered May 26 at 23:06

9 votes

What's the use of Malgrange preparation theorem?

answered Oct 8, 2012 at 20:44

8 votes

Accepted

Gagliardo-Nirenberg inequality

answered Aug 20, 2012 at 13:33

8 votes

what's the motivation of Weyl calculus ?

answered May 1, 2012 at 12:38

8 votes

Is there any way to rewrite a partial differential equation using language of differential forms, tensors, etc?

answered May 23, 2013 at 20:06

8 votes

Why is multiplication on the space of smooth functions with compact support continuous?

answered Mar 19, 2016 at 15:20

8 votes

Were there attempts to express derivatives of Delta function as polynomials of Delta function?

answered Apr 10, 2018 at 15:41

8 votes

PDEs and algebraic varieties

answered Oct 28, 2023 at 23:41

7 votes

Symmetric version of Hilbert's seventeenth problem?

answered Mar 24, 2023 at 21:05

7 votes

Accepted

Integral representation of tempered distributions

answered Apr 9, 2020 at 12:17

7 votes

What is Quantization ?

answered May 26, 2013 at 18:38

7 votes

Accepted

Heat Equation on $[0,T] \times \mathbb{R}^n$

answered Jul 17, 2013 at 20:42

7 votes

Accepted

Is there an equivalent of Heisenberg's uncertainty principle in the decision sciences ?

answered May 8, 2013 at 21:43

7 votes

Generalization of the polarisation formula for symmetric bilinear forms to symmetric multilinear forms

answered Jun 3, 2012 at 17:18

7 votes

when a pseudo-differential operators to be compact?

answered May 15, 2012 at 6:49

6 votes

Accepted

When is the adjoint of a hypoelliptic operator also hypoelliptic?

answered Mar 5, 2012 at 14:49

6 votes

Accepted

Hormander's bracket condition for the adjoint of an operator

answered Dec 4, 2012 at 20:42

6 votes

About the definition of Borel and Radon measures

answered Dec 12, 2012 at 20:46

6 votes

Accepted

Multivariate Hermite Polynomials

answered Mar 13, 2014 at 13:05

6 votes

Is there a Faa di Bruno-like formula for composition of three functions?

answered May 8, 2017 at 17:03

6 votes

Are Besov spaces $B^{s}_{p,q}$ invariant under Fourier transform?

answered Sep 4, 2014 at 13:13

5 votes

Is there a compactly supported function that its Fourier transfrom vanishes at given n real points?

answered Dec 6, 2014 at 19:38

5 votes

Accepted

Extension of solutions of PDEs with constant coefficients

answered Dec 8, 2014 at 12:02

5 votes

Easy Garding Inequality

answered May 10, 2016 at 17:45

5 votes

Accepted

when is an eigenvalue differentiable with respect to a parameter?

answered May 26, 2018 at 17:21

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380 Answers

Motivation for and history of pseudo-differential operators

Does Physics need non-analytic smooth functions?

Pullback measures

Fourier Coefficients and Hölder Continuity

Analyticity of $fg$ with $f$ and $g$ smooth on $\mathbb{R}$ and analytic on $\mathbb{R}^$

Fourier transform in $L^1$?

What's the use of Malgrange preparation theorem?

Gagliardo-Nirenberg inequality

what's the motivation of Weyl calculus ?

Is there any way to rewrite a partial differential equation using language of differential forms, tensors, etc?

Why is multiplication on the space of smooth functions with compact support continuous?

Were there attempts to express derivatives of Delta function as polynomials of Delta function?

PDEs and algebraic varieties

Symmetric version of Hilbert's seventeenth problem?

Integral representation of tempered distributions

What is Quantization ?

Heat Equation on $[0,T] \times \mathbb{R}^n$

Is there an equivalent of Heisenberg's uncertainty principle in the decision sciences ?

Generalization of the polarisation formula for symmetric bilinear forms to symmetric multilinear forms

when a pseudo-differential operators to be compact?

When is the adjoint of a hypoelliptic operator also hypoelliptic?

Hormander's bracket condition for the adjoint of an operator

About the definition of Borel and Radon measures

Multivariate Hermite Polynomials

Is there a Faa di Bruno-like formula for composition of three functions?

Are Besov spaces $B^{s}_{p,q}$ invariant under Fourier transform?

Is there a compactly supported function that its Fourier transfrom vanishes at given n real points?

Extension of solutions of PDEs with constant coefficients

Easy Garding Inequality

when is an eigenvalue differentiable with respect to a parameter?