List questions from proof-writing

Published on 11 Apr 2026 - 8:21

54

Views

Epsilon proof 10

Published on 15 Apr 2026 - 17:44

594

Views

Prove that there do not exist integers $a, b$ and $k$ such that $a^2+b^2=4k+3$.

Published on 15 Apr 2026 - 15:14

374

Views

Every weak neighborhood of $0$ contains a neighborhood of the form $V = \left\{ x : |\Lambda_i x | < r_i \;\text{for} \; 1 \leq i \leq n\right\}$

Published on 16 Apr 2026 - 3:19

269

Views

4x4 Chromatic Sudoku Graph

Published on 23 Apr 2026 - 5:05

88

Views

Proof a Cauchy sequence.

Published on 13 Apr 2026 - 13:02

50

Views

proof with multiplicative inverses mod n

Published on 13 Apr 2026 - 12:05

71

Views

Logic and uniqueness

Published on 11 Apr 2026 - 21:56

61

Views

$[0,1]$ is compact regarding the basis $\mathscr{B}=\{\{q\}:q\in\mathbb{Q}\cap[0,1]\}\cup\{]a,b[:0\leqslant a<b\leqslant 1\}\}$

Published on 16 Apr 2026 - 20:33

798

Views

For all integers $x$, prove or disprove: $x^3 + x$ is even.

Published on 25 Apr 2026 - 4:15

151

Views

I have written up a proof on why norms on $\mathbb{R}^n$ are equivalent

Published on 09 Apr 2026 - 8:07

256

Views

Proving that the elements of a sequence will always be co-prime to each other.

Published on 09 Apr 2026 - 5:51

520

Views

Logical equivalences for $P \implies Q$ and $\neg Q \implies \neg P$

Published on 17 Apr 2026 - 10:05

1.6k

Views

Associative law of scalar and matrix multiplication

Published on 17 Apr 2026 - 4:18

53

Views

Modular Arithmetic Question -- Sum of digits of consecutive numbers.

Published on 09 Apr 2026 - 3:52

List Question

Proof writing of decimal expressions

Epsilon proof 10

Prove that there do not exist integers $a, b$ and $k$ such that $a^2+b^2=4k+3$.

Every weak neighborhood of $0$ contains a neighborhood of the form $V = \left\{ x : |\Lambda_i x | < r_i \;\text{for} \; 1 \leq i \leq n\right\}$

4x4 Chromatic Sudoku Graph

Proof a Cauchy sequence.

proof with multiplicative inverses mod n

Logic and uniqueness

$[0,1]$ is compact regarding the basis $\mathscr{B}=\{\{q\}:q\in\mathbb{Q}\cap[0,1]\}\cup\{]a,b[:0\leqslant a<b\leqslant 1\}\}$

For all integers $x$, prove or disprove: $x^3 + x$ is even.

I have written up a proof on why norms on $\mathbb{R}^n$ are equivalent

Proving that the elements of a sequence will always be co-prime to each other.

Logical equivalences for $P \implies Q$ and $\neg Q \implies \neg P$

Associative law of scalar and matrix multiplication

Modular Arithmetic Question -- Sum of digits of consecutive numbers.

Trending Questions

Popular # Hahtags

Popular Questions