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21 votes

Derivative of the Gamma function

special-functions gamma-function asked Apr 22, 2015 at 15:21
math.stackexchange.com

17 votes

Largest known zero of the Riemann zeta function

nt.number-theory analytic-number-theory riemann-zeta-function riemann-hypothesis asked Mar 8, 2017 at 10:24
mathoverflow.net

17 votes

Is this entire function a square?

cv.complex-variables holomorphic-symplectic asked Jul 11 at 10:11
mathoverflow.net

16 votes

Eigenvectors of the Fourier transformation

fourier-analysis fourier-transform schwartz-distributions asked May 10, 2016 at 12:47
mathoverflow.net

16 votes

Nonnegative smooth function as sum of squares of smooth functions

ca.analysis-and-odes dg.differential-geometry asked Aug 31, 2012 at 20:28
mathoverflow.net

15 votes

Uncertainty principle

ca.analysis-and-odes mp.mathematical-physics harmonic-analysis asked Oct 19, 2016 at 13:21
mathoverflow.net

14 votes

Surjectivity of curl

ca.analysis-and-odes ap.analysis-of-pdes fluid-dynamics asked Jan 17, 2015 at 20:47
mathoverflow.net

13 votes

Radon-Nikodym theorem for non-sigma finite measures

measure-theory lebesgue-measure hausdorff-measure asked Jan 6, 2017 at 14:17
mathoverflow.net

10 votes

Poincaré lemma for distributions

fa.functional-analysis ap.analysis-of-pdes cohomology linear-pde schwartz-distributions asked Feb 12, 2016 at 19:37
mathoverflow.net

9 votes

Inequality for Laguerre polynomials

inequalities special-functions orthogonal-polynomials asked Mar 17, 2014 at 20:18
mathoverflow.net

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Top Answers
40
Motivation for and history of pseudo-differential operators
mathoverflow.net

27
Does Physics need non-analytic smooth functions?
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22
Pullback measures
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11
Fourier Coefficients and Hölder Continuity
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9
What's the use of Malgrange preparation theorem?
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9
Gagliardo-Nirenberg inequality
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8
Is there any way to rewrite a partial differential equation using language of differential forms, tensors, etc?
mathoverflow.net

8
Were there attempts to express derivatives of Delta function as polynomials of Delta function?
mathoverflow.net

8
Why is multiplication on the space of smooth functions with compact support continuous?
mathoverflow.net

8
what's the motivation of Weyl calculus ?
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8
Is there an equivalent of Heisenberg's uncertainty principle in the decision sciences ?
mathoverflow.net

7
PDEs and algebraic varieties
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7
Symmetric version of Hilbert's seventeenth problem?
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7
Integral representation of tempered distributions
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7
when a pseudo-differential operators to be compact?
mathoverflow.net

7
What is Quantization ?
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7
Heat Equation on $[0,T] \times \mathbb{R}^n$
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6
Hormander's bracket condition for the adjoint of an operator
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6
When is the adjoint of a hypoelliptic operator also hypoelliptic?
mathoverflow.net

6
About the definition of Borel and Radon measures
mathoverflow.net

6
Are Besov spaces $B^{s}_{p,q}$ invariant under Fourier transform?
mathoverflow.net

6
Is there a Faa di Bruno-like formula for composition of three functions?
mathoverflow.net

6
Generalization of the polarisation formula for symmetric bilinear forms to symmetric multilinear forms
mathoverflow.net

5
About the boundedness of a multiplication operator.
mathoverflow.net

5
Real function to entire functions
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5
Quasi-linear System of First Order P.D.E.s of "Mixed" type
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5
Fourier transform of Analytic Functions
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5
Embedding of weighted Sobolev spaces
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5
When is a Pseudo-differential operator trace class or in Dixmier ideal?
mathoverflow.net

5
Support-preserving pseudodifferential operators
mathoverflow.net

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