Question

Given $A$ is a set of cardinality $c$ and $p, q$ and $r$ are distinct members of $A$

score 71 · Answer 1 · 2026-04-16 10:06:02

71

Views

Given $A$ is a set of cardinality $c$ and $p, q$ and $r$ are distinct members of $A$

Published on 16 Apr 2026 - 10:06

score 136 · Answer 2 · 2026-04-14 15:18:09

136

Views

Proof that dim(ran(T + S)) ≤ dim(ran(T)) + dim(ran(S))

Published on 14 Apr 2026 - 15:18

score 46 · Answer 3 · 2026-04-13 15:44:52

46

Views

Elementary questions regarding countable sets

Published on 13 Apr 2026 - 15:44

score 117 · Answer 4 · 2026-04-16 18:24:11

117

Views

If $(a_n)\to A\neq 0$ and $(a_n b_n)\to AB$ then $(b_n)\to B$

Published on 16 Apr 2026 - 18:24

score 31 · Answer 5 · 2026-04-16 08:47:40

31

Views

Proving Elementary question regarding non empty finite sets by contradiction

Published on 16 Apr 2026 - 8:47

score 58 · Answer 6 · 2026-04-15 18:40:33

58

Views

On a conjecture that two intersections are at $\big(\pm\frac{S}m, S\big)$ (about linear equations)

Published on 15 Apr 2026 - 18:40

score 562 · Answer 7 · 2026-04-16 11:57:21

562

Views

Prove that $|\{1,2,3,...,n\}|=n$ for all natural numbers $n$ by mathematical induction

Published on 16 Apr 2026 - 11:57

score 75 · Answer 8 · 2026-04-15 18:28:43

75

Views

$X$ is defined as the collection of sets $X = \{X_i: i \in [0, 1] \}$ where each set has cardinality $c$

Published on 15 Apr 2026 - 18:28

score 50 · Answer 9 · 2026-04-14 21:30:46

50

Views

Bijection between $ \bigcup_{i \in [0, 1]} X_i \ \ \ \text{and} \ \ \ [0, 1] \times [0, 1] $

Published on 14 Apr 2026 - 21:30

score 59 · Answer 10 · 2026-04-09 04:15:03

59

Views

Advice regarding preliminary proof of an untrue theorem

Published on 09 Apr 2026 - 4:15

score 733 · Answer 11 · 2026-04-12 17:28:39

733

Views

How to prove two sets are bijective given limited information?

Published on 12 Apr 2026 - 17:28

score 40 · Answer 12 · 2026-04-16 20:00:11

40

Views

Prove that $M_n\mid (i+n)(i-n)$ and $M_n\mid(i+n-1)(i-n+1)$

Published on 16 Apr 2026 - 20:00

score 60 · Answer 13 · 2026-04-13 18:24:59

60

Views

Is this a sound proof of the fact that $a_n <C$ infinitely often?

Published on 13 Apr 2026 - 18:24

score 54 · Answer 14 · 2026-04-12 10:43:45

54

Views

Question with regards to logic of proof:

Published on 12 Apr 2026 - 10:43

score 1.2k · Answer 15 · 2026-04-12 15:45:37

1.2k

Views

Peano axioms and commutativity of addition

Published on 12 Apr 2026 - 15:45

List Question

Given $A$ is a set of cardinality $c$ and $p, q$ and $r$ are distinct members of $A$

Proof that dim(ran(T + S)) ≤ dim(ran(T)) + dim(ran(S))

Elementary questions regarding countable sets

If $(a_n)\to A\neq 0$ and $(a_n b_n)\to AB$ then $(b_n)\to B$

Proving Elementary question regarding non empty finite sets by contradiction

On a conjecture that two intersections are at $\big(\pm\frac{S}m, S\big)$ (about linear equations)

Prove that $|\{1,2,3,...,n\}|=n$ for all natural numbers $n$ by mathematical induction

$X$ is defined as the collection of sets $X = \{X_i: i \in [0, 1] \}$ where each set has cardinality $c$

Bijection between $ \bigcup_{i \in [0, 1]} X_i \ \ \ \text{and} \ \ \ [0, 1] \times [0, 1] $

Advice regarding preliminary proof of an untrue theorem

How to prove two sets are bijective given limited information?

Prove that $M_n\mid (i+n)(i-n)$ and $M_n\mid(i+n-1)(i-n+1)$

Is this a sound proof of the fact that $a_n <C$ infinitely often?

Question with regards to logic of proof:

Peano axioms and commutativity of addition

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