User emacs drives me nuts - Mathematics Stack Exchange

13 votes

3 answers

2k views

What's the meaning of square brackets $[~]$

asked Aug 12, 2022 at 15:00

12 votes

1 answer

612 views

Can the real numbers be equally split into two sets of same measure?

asked May 16, 2022 at 11:58

9 votes

1 answer

194 views

Representation of Real Number as infinte Product $\prod(1\pm2^{-k})$

asked Sep 12, 2023 at 16:11

8 votes

1 answer

723 views

Car, road, traffic-lights and an optimization problem.

asked May 12, 2020 at 13:23

7 votes

4 answers

748 views

Find the center of all circles that touch the $x$-axis and a circle centered at the origin

asked Mar 8 at 17:13

6 votes

1 answer

185 views

How to find the most square-ish factorization of an integer?

asked Sep 7, 2021 at 10:24

5 votes

3 answers

883 views

Finding formula that solves $w^4+x^4=y^4+z^4$ over the integers.

asked Sep 20, 2021 at 10:09

5 votes

1 answer

99 views

Approximating $\sum_{p\in\Bbb P} \frac1{p\ln p}$

asked Jun 29, 2022 at 15:59

5 votes

1 answer

111 views

For which periodic sequences $(a_n)$ does the series $\sum \frac{a_n}n$ converge?

asked Jul 15, 2022 at 17:35

5 votes

2 answers

141 views

Expanding Arcus Tangens as Taylor Series around 1: Symmetries

asked Mar 28, 2023 at 17:35

5 votes

2 answers

129 views

What's the $2$d-object that's in $1:1$ correspondence with all lines in $\Bbb R^2$?

asked Aug 13, 2022 at 10:17

4 votes

2 answers

110 views

pow and its relative error

asked Jun 8 at 12:04

3 votes

2 answers

168 views

Closed form for the $n$-th derivative of $\csc^2$?

asked Dec 1, 2023 at 17:00

3 votes

1 answer

181 views

Number of solutions of $f(x)=ax+b$ for a strictly convex real function $f$.

asked Aug 21, 2022 at 18:29

3 votes

1 answer

185 views

Finding $c$ such that $\ln\cosh x \approx \sqrt{c^2+x^2}-c$

asked Aug 3, 2022 at 18:58

3 votes

0 answers

67 views

Advantage of "integrating by differentiating" ie.$\def\e{\varepsilon}\int_a^b f(x)dx=\lim_{\e\to0}f(d/d\e)\frac{e^{\e b}-e^{\e a}}\e$

asked May 15, 2022 at 18:42

3 votes

1 answer

229 views

Solving $n!=x$ for $n$.

asked Jul 17, 2022 at 16:06

3 votes

1 answer

55 views

Re-ordering conditionally convergent series over $\Bbb C$.

asked Oct 25, 2023 at 16:50

3 votes

1 answer

85 views

[Probabilistic number theory]: Sum of exponents from prime factorization of a natural number.

asked Jul 15, 2022 at 9:43

3 votes

3 answers

172 views

Is $\Bbb Q\times(\Bbb R\setminus\Bbb Q)$ connected?

asked Mar 5, 2020 at 11:21

2 votes

1 answer

107 views

Is $a/bc$ unambiguous? [duplicate]

asked Mar 12, 2020 at 14:13

2 votes

1 answer

229 views

Find positive, coprime integers whose reciprocals sum to 1.

asked Feb 21, 2020 at 8:26

2 votes

1 answer

306 views

Complete family of smooth, orthogonal functions with compact support exists?

asked Mar 2, 2020 at 13:05

2 votes

1 answer

654 views

When is 0.99999… ≠ 1?

asked Sep 24, 2021 at 17:41

2 votes

1 answer

171 views

If $f:G\to S$ is holomorphic with $f'(z)\neq 0$, does this imply that $f$ is injective if $G\subset\Bbb C$ and $S=f(G)$ are open and simply connected? [duplicate]

asked Jun 9, 2022 at 16:00

2 votes

0 answers

120 views

A power series that converges conditionally for all points on the radius of convergence?

asked Jun 13, 2022 at 15:55

2 votes

1 answer

178 views

Closed / explicit form of a recursively defined real function involving a square root?

asked May 30, 2022 at 17:27

2 votes

0 answers

22 views

Moduli space for $A\sim B$ if $A(D)=B(D)$ for unit ball $D$ and $A,B:\Bbb R\to\Bbb R$ linear

asked Sep 27, 2023 at 11:50

2 votes

0 answers

110 views

Why is $\ln2\approx 0.4^{0.4}$?

asked Nov 18, 2023 at 18:09

1 vote

1 answer

58 views

Representation of Weierstraß $\wp$ function for $\Lambda=\Bbb Z+\Bbb Z i$ as series over trigonometric function

asked Nov 16, 2023 at 16:47

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42 Questions

What's the meaning of square brackets $[~]$

Can the real numbers be equally split into two sets of same measure?

Representation of Real Number as infinte Product $\prod(1\pm2^{-k})$

Car, road, traffic-lights and an optimization problem.

Find the center of all circles that touch the $x$-axis and a circle centered at the origin

How to find the most square-ish factorization of an integer?

Finding formula that solves $w^4+x^4=y^4+z^4$ over the integers.

Approximating $\sum_{p\in\Bbb P} \frac1{p\ln p}$

For which periodic sequences $(a_n)$ does the series $\sum \frac{a_n}n$ converge?

Expanding Arcus Tangens as Taylor Series around 1: Symmetries

What's the $2$d-object that's in $1:1$ correspondence with all lines in $\Bbb R^2$?

pow and its relative error

Closed form for the $n$-th derivative of $\csc^2$?

Number of solutions of $f(x)=ax+b$ for a strictly convex real function $f$.

Finding $c$ such that $\ln\cosh x \approx \sqrt{c^2+x^2}-c$

Advantage of "integrating by differentiating" ie.$\def\e{\varepsilon}\int_a^b f(x)dx=\lim_{\e\to0}f(d/d\e)\frac{e^{\e b}-e^{\e a}}\e$

Solving $n!=x$ for $n$.

Re-ordering conditionally convergent series over $\Bbb C$.

[Probabilistic number theory]: Sum of exponents from prime factorization of a natural number.

Is $\Bbb Q\times(\Bbb R\setminus\Bbb Q)$ connected?

Is $a/bc$ unambiguous? [duplicate]

Find positive, coprime integers whose reciprocals sum to 1.

Complete family of smooth, orthogonal functions with compact support exists?

When is 0.99999… ≠ 1?

If $f:G\to S$ is holomorphic with $f'(z)\neq 0$, does this imply that $f$ is injective if $G\subset\Bbb C$ and $S=f(G)$ are open and simply connected? [duplicate]

A power series that converges conditionally for all points on the radius of convergence?

Closed / explicit form of a recursively defined real function involving a square root?

Moduli space for $A\sim B$ if $A(D)=B(D)$ for unit ball $D$ and $A,B:\Bbb R\to\Bbb R$ linear

Why is $\ln2\approx 0.4^{0.4}$?

Representation of Weierstraß $\wp$ function for $\Lambda=\Bbb Z+\Bbb Z i$ as series over trigonometric function