Question

Groups with the subtraction operation

score 809 · Answer 1 · 2026-04-11 18:04:04

809

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Groups with the subtraction operation

Published on 11 Apr 2026 - 18:04

score 1.1k · Answer 2 · 2026-03-27 15:16:54

1.1k

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Solving the congruence $7x + 3 = 1 \mod 31$?

Published on 27 Mar 2026 - 15:16

score 83 · Answer 3 · 2026-04-09 15:04:23

83

Views

Are there positive integral solutions for this simple system?

Published on 09 Apr 2026 - 15:04

score 93 · Answer 4 · 2026-03-28 02:24:26

93

Views

Prob. 15, Sec. 1.3, in Herstein's TOPICS IN ALGEBRA 2nd ed: If $(m, n)=1$, then, given $a$ and $b$, there is an $x$ such that

Published on 28 Mar 2026 - 2:24

score 62 · Answer 5 · 2019-10-04 15:23:12

62

Views

If a is a $\mathbb Z / p\mathbb Z$ generator, if $k$ is not a multiple of $p-1$, $a ^ k \not\equiv 1\pmod p$

Published on 04 Oct 2019 - 15:23

score 119 · Answer 6 · 2026-03-25 15:52:34

119

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Is there a standard group presentation for the group of units $U(n)$ modulo $n$?

Published on 25 Mar 2026 - 15:52

score 53 · Answer 7 · 2026-04-11 12:36:38

53

Views

Proof using modulo

Published on 11 Apr 2026 - 12:36

score 230 · Answer 8 · 2019-10-05 11:01:34

230

Views

Find all five digit number $\overline{abcde}$ such that $\overline{abcde} = \overline{(ace})^2$

Published on 05 Oct 2019 - 11:01

score 65 · Answer 9 · 2019-10-06 00:15:56

65

Views

Proof writing: looking for help in precisely expressing an idea I have about combinations of pairs of distinct residue classes

Published on 06 Oct 2019 - 0:15

score 1.2k · Answer 10 · 2026-04-11 17:41:49

1.2k

Views

Proving isomorphism on additive group $(\Bbb{Z}_4,+)$ and multiplicative group $(\Bbb{Z}_5^*, \times)$

Published on 11 Apr 2026 - 17:41

score 107 · Answer 11 · 2026-04-06 19:30:28

107

Views

Elementary Number Theory and Congruences

Published on 06 Apr 2026 - 19:30

score 42 · Answer 12 · 2019-10-06 21:04:03

42

Views

Cardinality Of Set Where No Sum Of Elements Equals Some $k$

Published on 06 Oct 2019 - 21:04

score 274 · Answer 13 · 2026-03-31 22:50:41

274

Views

Preimages of elements in linear maps involving finite fields

Published on 31 Mar 2026 - 22:50

score 196 · Answer 14 · 2019-10-07 10:01:36

196

Views

How many natural number between $100$ and $1000$ exist which can be expressed as sum of 10 different primes.

Published on 07 Oct 2019 - 10:01

score 94 · Answer 15 · 2026-03-29 06:54:52

94

Views

Find prime fields over which a polynomial has roots.

Published on 29 Mar 2026 - 6:54

List Question

Groups with the subtraction operation

Solving the congruence $7x + 3 = 1 \mod 31$?

Are there positive integral solutions for this simple system?

Prob. 15, Sec. 1.3, in Herstein's TOPICS IN ALGEBRA 2nd ed: If $(m, n)=1$, then, given $a$ and $b$, there is an $x$ such that

If a is a $\mathbb Z / p\mathbb Z$ generator, if $k$ is not a multiple of $p-1$, $a ^ k \not\equiv 1\pmod p$

Is there a standard group presentation for the group of units $U(n)$ modulo $n$?

Proof using modulo

Find all five digit number $\overline{abcde}$ such that $\overline{abcde} = \overline{(ace})^2$

Proof writing: looking for help in precisely expressing an idea I have about combinations of pairs of distinct residue classes

Proving isomorphism on additive group $(\Bbb{Z}_4,+)$ and multiplicative group $(\Bbb{Z}_5^*, \times)$

Elementary Number Theory and Congruences

Cardinality Of Set Where No Sum Of Elements Equals Some $k$

Preimages of elements in linear maps involving finite fields

How many natural number between $100$ and $1000$ exist which can be expressed as sum of 10 different primes.

Find prime fields over which a polynomial has roots.

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