Question

If set of divisors of elements of a difference set $\Delta S = S - S \subset R$ a commutative ring is the whole ring (!) then $\Delta S$ is an ideal

score 35 · Answer 1 · 2026-03-25 07:45:45

35

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If set of divisors of elements of a difference set $\Delta S = S - S \subset R$ a commutative ring is the whole ring (!) then $\Delta S$ is an ideal

Published on 25 Mar 2026 - 7:45

score 92 · Answer 2 · 2026-03-25 06:04:59

92

Views

Why is the difference of consecutive primes from Fibonacci sequence divisible by $4$?

Published on 25 Mar 2026 - 6:04

score 129 · Answer 3 · 2026-04-06 01:46:59

129

Views

Constructing $\lambda$-difference sets

Published on 06 Apr 2026 - 1:46

score 908 · Answer 4 · 2026-03-25 07:32:19

908

Views

Show that the complement of a difference set is a difference set

Published on 25 Mar 2026 - 7:32

score 190 · Answer 5 · 2026-03-25 06:02:27

190

Views

Number of Inequivalent Difference Sets In Elementary Abelian 2-groups

Published on 25 Mar 2026 - 6:02

score 289 · Answer 6 · 2026-03-25 05:59:16

289

Views

Difference sets avoiding quadratic residues

Published on 25 Mar 2026 - 5:59

score 110 · Answer 7 · 2026-03-25 05:59:42

110

Views

Is there a canonical form for difference sets?

Published on 25 Mar 2026 - 5:59

score 141 · Answer 8 · 2026-03-25 06:04:19

141

Views

Proof that the symmetric design isomorphic to $PG(m,q)$ has an automorphism acting regularly on points (Singer's Theorem)

Published on 25 Mar 2026 - 6:04

score 497 · Answer 9 · 2026-04-15 04:33:03

497

Views

Combinatorial design difference set proof: adding 0 to Paley difference set

Published on 15 Apr 2026 - 4:33

score 193 · Answer 10 · 2026-04-04 23:54:00

193

Views

Constructions of small set with big difference set

Published on 04 Apr 2026 - 23:54

score 376 · Answer 11 · 2026-04-17 04:52:15

376

Views

The relation between perfect difference sets and finite projective planes

Published on 17 Apr 2026 - 4:52

score 84 · Answer 12 · 2026-03-25 06:00:38

84

Views

How to convert sets of ODE to difference equations

Published on 25 Mar 2026 - 6:00

score 52 · Answer 13 · 2026-03-25 06:05:40

What is that called in set theory that can be used in programming to make set A equal to set B by adding to and subtracting from B the differences?

score 53 · Answer 14 · 2026-03-25 07:32:18

53

Views

Characterization of density through the interior

Published on 25 Mar 2026 - 7:32

score 32 · Answer 15 · 2026-03-25 12:45:49

32

Views

Reference request: Algorithms for constructing Perfect Difference Sets

Published on 25 Mar 2026 - 12:45

List Question

If set of divisors of elements of a difference set $\Delta S = S - S \subset R$ a commutative ring is the whole ring (!) then $\Delta S$ is an ideal

Why is the difference of consecutive primes from Fibonacci sequence divisible by $4$?

Constructing $\lambda$-difference sets

Show that the complement of a difference set is a difference set

Number of Inequivalent Difference Sets In Elementary Abelian 2-groups

Difference sets avoiding quadratic residues

Is there a canonical form for difference sets?

Proof that the symmetric design isomorphic to $PG(m,q)$ has an automorphism acting regularly on points (Singer's Theorem)

Combinatorial design difference set proof: adding 0 to Paley difference set

Constructions of small set with big difference set

The relation between perfect difference sets and finite projective planes

How to convert sets of ODE to difference equations

What is that called in set theory that can be used in programming to make set A equal to set B by adding to and subtracting from B the differences?

Characterization of density through the interior

Reference request: Algorithms for constructing Perfect Difference Sets

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