Question

Sufficient conditions for a model of second-order ZFC

score 129 · Answer 1 · 2026-04-18 03:16:39

129

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Sufficient conditions for a model of second-order ZFC

Published on 18 Apr 2026 - 3:16

score 113 · Answer 2 · 2026-04-11 02:44:35

113

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$<$ is a trichotomic relation on $\mathbb N$

Published on 11 Apr 2026 - 2:44

score 29 · Answer 3 · 2026-04-15 14:34:09

29

Views

A question related to sets, their intersections and unions.

Published on 15 Apr 2026 - 14:34

score 213 · Answer 4 · 2026-04-09 11:01:13

213

Views

Suggestion for a textbook including Von Neumann definition of ordinal numbers

Published on 09 Apr 2026 - 11:01

score 579 · Answer 5 · 2026-04-13 21:10:45

579

Views

Does Indexed Union distribute over Indexed Intersection? (same index)

Published on 13 Apr 2026 - 21:10

score 895 · Answer 6 · 2026-04-09 22:04:20

895

Views

Determining the cardinality from set builder notation

Published on 09 Apr 2026 - 22:04

score 85 · Answer 7 · 2026-04-13 11:14:19

85

Views

How can I show that these two sets have the same cardinal?

Published on 13 Apr 2026 - 11:14

score 879 · Answer 8 · 2026-04-13 12:46:55

879

Views

How to prove lexicographic ordering is reflexive given only "less than" condition?

Published on 13 Apr 2026 - 12:46

score 332 · Answer 9 · 2026-04-17 08:14:50

332

Views

Find $\limsup_{n \rightarrow \infty} A_n$ and $\liminf_{n \rightarrow \infty} A_n$ when $A_n = \{x: a_n \leq x < b_n\}$.

Published on 17 Apr 2026 - 8:14

score 215 · Answer 10 · 2026-04-13 20:47:03

215

Views

Does the size of a Venn diagram indicate the cardinality of the set?

Published on 13 Apr 2026 - 20:47

score 111 · Answer 11 · 2026-04-14 14:04:56

111

Views

Countable unions and the whole real line R

Published on 14 Apr 2026 - 14:04

score 565 · Answer 12 · 2026-04-12 04:03:20

565

Views

Using a Set Builder Notation

Published on 12 Apr 2026 - 4:03

score 172 · Answer 13 · 2026-04-12 17:56:36

172

Views

First-Order Predicate Definition for Intersection of a Set

Published on 12 Apr 2026 - 17:56

score 80 · Answer 14 · 2026-04-15 20:51:42

80

Views

Do we need Axiom of Regularity to prove that $a=\{x,\{x\}\}\text{ is an ordinal }\implies x=\emptyset$?

Published on 15 Apr 2026 - 20:51

score 55 · Answer 15 · 2026-04-14 03:23:29

55

Views

Why real number is linear ordered (total ordered) but uncountable?

Published on 14 Apr 2026 - 3:23

List Question

Sufficient conditions for a model of second-order ZFC

$<$ is a trichotomic relation on $\mathbb N$

A question related to sets, their intersections and unions.

Suggestion for a textbook including Von Neumann definition of ordinal numbers

Does Indexed Union distribute over Indexed Intersection? (same index)

Determining the cardinality from set builder notation

How can I show that these two sets have the same cardinal?

How to prove lexicographic ordering is reflexive given only "less than" condition?

Find $\limsup_{n \rightarrow \infty} A_n$ and $\liminf_{n \rightarrow \infty} A_n$ when $A_n = \{x: a_n \leq x < b_n\}$.

Does the size of a Venn diagram indicate the cardinality of the set?

Countable unions and the whole real line R

Using a Set Builder Notation

First-Order Predicate Definition for Intersection of a Set

Do we need Axiom of Regularity to prove that $a=\{x,\{x\}\}\text{ is an ordinal }\implies x=\emptyset$?

Why real number is linear ordered (total ordered) but uncountable?

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