User Fan Zheng

28 votes

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Is $\Bbb S^2 \times \Bbb S^4$ symplectic?

answered Jul 13, 2018 at 4:34

15 votes

Is it true that for each bounded continuous function we can find a set of analytic functions to uniformly converge it?

answered Mar 16, 2015 at 17:58

14 votes

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Can the topological algebra of analytic functions be endowed with a norm that defines the natural topology?

answered Apr 28, 2016 at 22:52

11 votes

A geometric proof of Krull's Principal ideal theorem

answered Jul 18, 2018 at 3:59

8 votes

Is there a non discrete norm on $\mathbb{Z}$ (the group of integers) which is unbounded?

answered Nov 5, 2016 at 22:39

7 votes

Primes as uncorrelated random variables

answered Apr 17, 2015 at 1:01

6 votes

Intuition behind using energy estimate to prove existence and uniqueness of solution for Hyperbolic equation

answered Jun 7, 2018 at 23:01

6 votes

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Could Furstenberg's Argument Prove the Infinitude of Primes in Number Fields?

answered Sep 12, 2017 at 18:42

5 votes

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Taking away the "almost sure"

answered Oct 5, 2016 at 20:24

5 votes

Localization and containment in commutative ring

answered Jul 12, 2019 at 17:03

5 votes

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Fourier coefficients of real analytic functions on an n-dimension torus

answered Apr 18, 2015 at 6:17

5 votes

Intermediate value for a vector-valued function

answered Nov 10, 2015 at 15:57

5 votes

Existence of a uniformly continuous function $g$ on $\mathbb{R}$ where $f = g$ a.e.?

answered Nov 6, 2016 at 4:34

5 votes

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Distance function is unique nonnegative continuous function on $\mathbb{R}^d$ satisfying following

answered Dec 12, 2016 at 18:57

5 votes

Integer-valued power sums

answered Dec 12, 2016 at 22:53

4 votes

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Least simultaneous quadratic non-residue

answered Nov 30, 2015 at 3:16

4 votes

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Lemma 2.11 of Tao's Nonlinear Dispersive Equations

answered Apr 8, 2015 at 21:58

4 votes

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Counting solutions of a certain diophantine equation

answered Apr 5, 2017 at 2:56

4 votes

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How to show $a\mapsto \frac{\gamma(a,x)}{\Gamma(a)}$ is decreasing on $\mathbb{R}_+^*$?

answered Oct 1, 2016 at 19:55

4 votes

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Fourier transform inversion theorem for a function not in L1 or L2

answered Nov 27, 2017 at 1:50

3 votes

Are there closed form solutions available for this equation below?

answered Sep 30, 2016 at 16:48

3 votes

A few general questions about pre-sheaves and sheaves

answered Jun 14, 2018 at 0:13

3 votes

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$L^2$ function in Schwartz space?

answered Jul 8, 2018 at 22:30

3 votes

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Does the induced representation preserve norm?

answered Jan 9, 2017 at 19:00

2 votes

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Solution to inhomogenous PDE

answered May 12, 2016 at 22:19

2 votes

Elliptic theory on compact manifolds

answered Mar 7, 2015 at 14:21

2 votes

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A continuity/bootstrap argument

answered Apr 28, 2016 at 1:51

2 votes

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Construction of vector space isomorphism where $f(v \otimes gh) = \sigma(g)(f(v \otimes h)),\text{ }\forall v \in V,\text{ }g,\,h \in G$

answered Dec 6, 2015 at 2:23

2 votes

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Is the interval topology of $(\mathbb{N}^\mathbb{N}, \leq^*)$ connected?

answered Dec 22, 2015 at 21:23

2 votes

Show that the Laplacian operator on the Heisenberg group is negative

answered Dec 29, 2015 at 16:34

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56 Answers

Is $\Bbb S^2 \times \Bbb S^4$ symplectic?

Is it true that for each bounded continuous function we can find a set of analytic functions to uniformly converge it?

Can the topological algebra of analytic functions be endowed with a norm that defines the natural topology?

A geometric proof of Krull's Principal ideal theorem

Is there a non discrete norm on $\mathbb{Z}$ (the group of integers) which is unbounded?

Primes as uncorrelated random variables

Intuition behind using energy estimate to prove existence and uniqueness of solution for Hyperbolic equation

Could Furstenberg's Argument Prove the Infinitude of Primes in Number Fields?

Taking away the "almost sure"

Localization and containment in commutative ring

Fourier coefficients of real analytic functions on an n-dimension torus

Intermediate value for a vector-valued function

Existence of a uniformly continuous function $g$ on $\mathbb{R}$ where $f = g$ a.e.?

Distance function is unique nonnegative continuous function on $\mathbb{R}^d$ satisfying following

Integer-valued power sums

Least simultaneous quadratic non-residue

Lemma 2.11 of Tao's Nonlinear Dispersive Equations

Counting solutions of a certain diophantine equation

How to show $a\mapsto \frac{\gamma(a,x)}{\Gamma(a)}$ is decreasing on $\mathbb{R}_+^*$?

Fourier transform inversion theorem for a function not in L1 or L2

Are there closed form solutions available for this equation below?

A few general questions about pre-sheaves and sheaves

$L^2$ function in Schwartz space?

Does the induced representation preserve norm?

Solution to inhomogenous PDE

Elliptic theory on compact manifolds

A continuity/bootstrap argument

Construction of vector space isomorphism where $f(v \otimes gh) = \sigma(g)(f(v \otimes h)),\text{ }\forall v \in V,\text{ }g,\,h \in G$

Is the interval topology of $(\mathbb{N}^\mathbb{N}, \leq^*)$ connected?

Show that the Laplacian operator on the Heisenberg group is negative