Question

Find $N$ and $M$ in $S × N + (S + 1) × M = T$ when all variables are integers

score 19 · Answer 1 · 2019-10-25 06:57:17

19

Views

Find $N$ and $M$ in $S × N + (S + 1) × M = T$ when all variables are integers

Published on 25 Oct 2019 - 6:57

score 80 · Answer 2 · 2026-03-27 16:26:26

80

Views

Indexing integer $k$-tuples

Published on 27 Mar 2026 - 16:26

score 70 · Answer 3 · 2019-10-27 16:55:29

70

Views

Prove that a particular string of numbers $y_1,y_2,...,y_n$ exists

Published on 27 Oct 2019 - 16:55

score 25 · Answer 4 · 2019-10-27 22:02:19

25

Views

Show $\sum_{c\mid d}\psi(c) = d$

Published on 27 Oct 2019 - 22:02

score 83 · Answer 5 · 2019-10-31 16:37:39

83

Views

Why every $(n-2)\times(n-2)$-submatrix of this $(n-2)\times n$ matrix has full rank?

Published on 31 Oct 2019 - 16:37

score 56 · Answer 6 · 2019-10-31 17:07:51

56

Views

Number of non-negative integral solution to $Ax=0$ for an integral $m\times n$ matrix $A$ with rank $m$ ($m\le n$)?

Published on 31 Oct 2019 - 17:07

score 852 · Answer 7 · 2019-11-01 02:23:19

852

Views

Why does exponentiating group elements by integers always make sense?

Published on 01 Nov 2019 - 2:23

score 146 · Answer 8 · 2026-02-23 06:39:34

146

Views

Maximum Number of Consecutive Numbers with Limited Prime Factors

Published on 23 Feb 2026 - 6:39

score 323 · Answer 9 · 2019-11-01 20:19:31

323

Views

Increase rank by stacking two matrices?

Published on 01 Nov 2019 - 20:19

score 165 · Answer 10 · 2019-11-02 18:19:39

165

Views

If $2x + 3y$ is multiple of $17$, then $9x + 5y$ is multiple of $17$

Published on 02 Nov 2019 - 18:19

score 488 · Answer 11 · 2026-03-25 23:10:42

488

Views

Relations between composite numbers, prime numbers, and perfect numbers.

Published on 25 Mar 2026 - 23:10

score 41 · Answer 12 · 2026-03-26 02:55:05

41

Views

Group homomorphism between $\mathbb{Z}/n\Bbb Z$ and $\mathbb{Z}$ must be zero

Published on 26 Mar 2026 - 2:55

score 1.1k · Answer 13 · 2019-11-04 02:03:49

1.1k

Views

Prove that $x$ is an integer if $x^4-x$ and $x^3-x$ are integers.

Published on 04 Nov 2019 - 2:03

score 1.1k · Answer 14 · 2019-11-04 02:19:10

Find the number of positive integer pairs (a,b) such that ${2a-1 \over b} ,{2b-1 \over a}$ are integers (A)1 (B)2 (C)3 (D) more than 3

score 324 · Answer 15 · 2019-11-04 18:48:27

324

Views

The integers $\mathbb{Z}$ are limit point compact with the symmetric topology.

Published on 04 Nov 2019 - 18:48

List Question

Find $N$ and $M$ in $S × N + (S + 1) × M = T$ when all variables are integers

Indexing integer $k$-tuples

Prove that a particular string of numbers $y_1,y_2,...,y_n$ exists

Show $\sum_{c\mid d}\psi(c) = d$

Why every $(n-2)\times(n-2)$-submatrix of this $(n-2)\times n$ matrix has full rank?

Number of non-negative integral solution to $Ax=0$ for an integral $m\times n$ matrix $A$ with rank $m$ ($m\le n$)?

Why does exponentiating group elements by integers always make sense?

Maximum Number of Consecutive Numbers with Limited Prime Factors

Increase rank by stacking two matrices?

If $2x + 3y$ is multiple of $17$, then $9x + 5y$ is multiple of $17$

Relations between composite numbers, prime numbers, and perfect numbers.

Group homomorphism between $\mathbb{Z}/n\Bbb Z$ and $\mathbb{Z}$ must be zero

Prove that $x$ is an integer if $x^4-x$ and $x^3-x$ are integers.

Find the number of positive integer pairs (a,b) such that ${2a-1 \over b} ,{2b-1 \over a}$ are integers (A)1 (B)2 (C)3 (D) more than 3

The integers $\mathbb{Z}$ are limit point compact with the symmetric topology.

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