Question

Suppose M ⊴ G and N ⊴ H. Show M × N ⊴ G × H and (G × H)/(M × N) ∼= (G/M) × (H/N).

score 18 · Answer 1 · 2026-03-17 02:36:15

18

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Suppose M ⊴ G and N ⊴ H. Show M × N ⊴ G × H and (G × H)/(M × N) ∼= (G/M) × (H/N).

Published on 17 Mar 2026 - 2:36

score 18 · Answer 2 · 2026-03-17 02:34:55

18

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A basic but interesting question on operators

Published on 17 Mar 2026 - 2:34

score 18 · Answer 3 · 2022-11-28 10:16:04

18

Views

Does adding non-variable quantifiers to a proposition change the proposition?

Published on 28 Nov 2022 - 10:16

score 18 · Answer 4 · 2026-03-17 02:35:10

18

Views

Number of ways to arrange $i$ distinct objects into tuples, with each listed at least once

Published on 17 Mar 2026 - 2:35

score 18 · Answer 5 · 2022-11-27 16:17:49

18

Views

If S is a finite ring of subsets of X and μ is finitely additive on S, then μ is σ-additive on S.

Published on 27 Nov 2022 - 16:17

score 18 · Answer 6 · 2026-03-17 02:36:11

18

Views

How to compute $i^:H^(U^{m+n})\rightarrow H^(U^m)\bigotimes H^(U^n)$?

Published on 17 Mar 2026 - 2:36

score 18 · Answer 7 · 2022-11-22 12:20:48

18

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When does $((A/P)[x])_{\bar{Q}} \simeq ((A/P)_P[x])_{\bar{Q}} $ hold?

Published on 22 Nov 2022 - 12:20

score 18 · Answer 8 · 2026-03-17 02:36:15

18

Views

Is it possible to use Leibniz Criteria to find out if a positive series converges?

Published on 17 Mar 2026 - 2:36

score 18 · Answer 9 · 2022-11-21 15:55:29

18

Views

Maximization of sum of a bivariate optimization problem

Published on 21 Nov 2022 - 15:55

score 18 · Answer 10 · 2022-11-20 09:45:45

18

Views

inverse hyperbolic sine (asinh) from other trigonometric functions (for use in Presto SQL)

Published on 20 Nov 2022 - 9:45

score 18 · Answer 11 · 2022-11-20 07:55:51

Given the properties of the first and second order derivatives of functions, and proving the relevant inequalities.

score 18 · Answer 12 · 2022-11-18 16:49:30

18

Views

Find the vector pointing up a plane

Published on 18 Nov 2022 - 16:49

score 18 · Answer 13 · 2022-11-17 12:35:36

18

Views

Finiteness character of a couple of series

Published on 17 Nov 2022 - 12:35

score 18 · Answer 14 · 2022-11-17 07:38:04

The set of configurations reachable from an initial configuration is a lattice -- nonconvergent/ infinite chip-firing games

score 18 · Answer 15 · 2022-11-16 11:39:48

Show $\{x\in M\mid\liminf\limits_{n\to\infty}f_n(x)\geq 1\}\neq\bigcup\limits_{n=1}^{\infty}\bigcap\limits_{k=n}^{\infty}\{x\in M\mid f_n(x)\geq 1\}$

List Question

Suppose M ⊴ G and N ⊴ H. Show M × N ⊴ G × H and (G × H)/(M × N) ∼= (G/M) × (H/N).

A basic but interesting question on operators

Does adding non-variable quantifiers to a proposition change the proposition?

Number of ways to arrange $i$ distinct objects into tuples, with each listed at least once

If S is a finite ring of subsets of X and μ is finitely additive on S, then μ is σ-additive on S.

How to compute $i^:H^(U^{m+n})\rightarrow H^(U^m)\bigotimes H^(U^n)$?

When does $((A/P)[x])_{\bar{Q}} \simeq ((A/P)_P[x])_{\bar{Q}} $ hold?

Is it possible to use Leibniz Criteria to find out if a positive series converges?

Maximization of sum of a bivariate optimization problem

inverse hyperbolic sine (asinh) from other trigonometric functions (for use in Presto SQL)

Given the properties of the first and second order derivatives of functions, and proving the relevant inequalities.

Find the vector pointing up a plane

Finiteness character of a couple of series

The set of configurations reachable from an initial configuration is a lattice -- nonconvergent/ infinite chip-firing games

Show $\{x\in M\mid\liminf\limits_{n\to\infty}f_n(x)\geq 1\}\neq\bigcup\limits_{n=1}^{\infty}\bigcap\limits_{k=n}^{\infty}\{x\in M\mid f_n(x)\geq 1\}$

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