User Thomas

3 votes

Geometrical objects whose volumes are fractional powers of their sizes

answered Nov 4, 2013 at 19:29

3 votes

Software for drawing geometry diagrams

answered Oct 9, 2015 at 4:36

3 votes

Proving that the only integer solution of $2x^2+3y^2=z^2$ is $(0,0,0)$

answered Apr 19, 2016 at 12:02

2 votes

Continuous function Limit Problem

answered Apr 19, 2014 at 15:47

2 votes

Continuity of the function $f(x,y)=\max\{x,y\}$ in $\mathbb{R}^2$.

answered Apr 17, 2016 at 3:25

2 votes

Accepted

Proving $f' = - \frac{\partial{F}/\partial{x}}{\partial{F}/\partial{y}}$

answered Apr 17, 2016 at 3:33

2 votes

Accepted

How to pick N random points on the surface of a torus?

answered Apr 29, 2014 at 22:14

2 votes

Evaluating $\lim_{x \to 0^+} (e^x-1)^{\frac{(\tan{x})^2}{\sqrt[3]{x^2}}}$

answered Dec 5, 2013 at 18:49

2 votes

Accepted

How to solve z^6 = -15625?

answered Dec 8, 2013 at 21:35

2 votes

There exist two points $P$ and $Q$ in $A$

answered Dec 3, 2013 at 13:18

1 vote

how to find all the solutions to $I+A+\cdots+A^n=0.$

answered Jan 11, 2014 at 13:12

1 vote

Find the number of integer solutions of the equation $x_{1}+x_{2}+...x_{6}=7, \text{ with } 0 \leq x_{i} \leq 2,i=1,...,6$

answered Jan 27, 2014 at 16:04

1 vote

Is there an algebra of summable series?

answered Nov 18, 2013 at 10:35

1 vote

A mean square derivative

answered Nov 3, 2013 at 10:49

1 vote

Theorems or results one can use to prove properties of integrands

answered Feb 10, 2015 at 13:08

1 vote

Accepted

Proving $\forall n \ \frac{(b)_n}{b^n} \to 1$ as $b \to \infty$.

answered Feb 1, 2014 at 17:40

1 vote

Accepted

Why is this series divergent: $\sum\limits_{n=0}^\infty n^2 \sin\left(\frac n{n^4 + 1}\right)$?

answered Feb 1, 2014 at 17:44

1 vote

Accepted

What does it mean for $\max_{1\leq{i}\leq{n}}x_i-1<\theta<\min_{1\leq{i}\leq{n}}x_i$?

answered Feb 2, 2014 at 10:34

1 vote

Accepted

Can somebody check my proof of this theorem about the derivative?

answered Feb 7, 2014 at 12:24

1 vote

Accepted

$\exists L \in \Bbb{R}(\forall n \in \Bbb{N}(a^\frac{\lfloor b \cdot 10^n\rfloor}{10^n} \leq L))$?

answered Feb 7, 2014 at 16:10

1 vote

No. of roots of $\sin\pi x=x^2-x+{5\over4}$

answered Apr 26, 2014 at 14:12

1 vote

Intuition about infinite sums

answered Sep 16, 2016 at 9:28

1 vote

Point in right triangle given two points and an angle

answered Aug 6, 2018 at 19:42

1 vote

Accepted

Is there a function with prescribed zeros and poles on an elliptic curve?

answered Oct 25, 2018 at 21:56

0 votes

Measure of sections - continuous?

answered Feb 7, 2014 at 20:19

0 votes

Maximizing $(\frac{N}{k})^k$ for integer k - proof

answered Feb 10, 2014 at 17:04

0 votes

Convergence in distribution of random variables question

answered Mar 6, 2014 at 9:26

0 votes

Accepted

Partial derivative of a function with another function inside it?

answered Feb 5, 2014 at 7:57

0 votes

Accepted

Set Theory - Given 2 sets, are they order-isomorphic

answered Feb 1, 2014 at 19:14

0 votes

Show how $\sum _{n=0}^{\infty }\:\frac{(1)^n}{ln\left(n+1\right)}$ diverges

answered Feb 6, 2015 at 9:52

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46 Answers

Geometrical objects whose volumes are fractional powers of their sizes

Software for drawing geometry diagrams

Proving that the only integer solution of $2x^2+3y^2=z^2$ is $(0,0,0)$

Continuous function Limit Problem

Continuity of the function $f(x,y)=\max\{x,y\}$ in $\mathbb{R}^2$.

Proving $f' = - \frac{\partial{F}/\partial{x}}{\partial{F}/\partial{y}}$

How to pick N random points on the surface of a torus?

Evaluating $\lim_{x \to 0^+} (e^x-1)^{\frac{(\tan{x})^2}{\sqrt[3]{x^2}}}$

How to solve z^6 = -15625?

There exist two points $P$ and $Q$ in $A$

how to find all the solutions to $I+A+\cdots+A^n=0.$

Find the number of integer solutions of the equation $x_{1}+x_{2}+...x_{6}=7, \text{ with } 0 \leq x_{i} \leq 2,i=1,...,6$

Is there an algebra of summable series?

A mean square derivative

Theorems or results one can use to prove properties of integrands

Proving $\forall n \ \frac{(b)_n}{b^n} \to 1$ as $b \to \infty$.

Why is this series divergent: $\sum\limits_{n=0}^\infty n^2 \sin\left(\frac n{n^4 + 1}\right)$?

What does it mean for $\max_{1\leq{i}\leq{n}}x_i-1<\theta<\min_{1\leq{i}\leq{n}}x_i$?

Can somebody check my proof of this theorem about the derivative?

$\exists L \in \Bbb{R}(\forall n \in \Bbb{N}(a^\frac{\lfloor b \cdot 10^n\rfloor}{10^n} \leq L))$?

No. of roots of $\sin\pi x=x^2-x+{5\over4}$

Intuition about infinite sums

Point in right triangle given two points and an angle

Is there a function with prescribed zeros and poles on an elliptic curve?

Measure of sections - continuous?

Maximizing $(\frac{N}{k})^k$ for integer k - proof

Convergence in distribution of random variables question

Partial derivative of a function with another function inside it?

Set Theory - Given 2 sets, are they order-isomorphic

Show how $\sum _{n=0}^{\infty }\:\frac{(1)^n}{ln\left(n+1\right)}$ diverges