Question

How to prove a particular set of differentiable functions is a subspace?

score 1.2k · Answer 1 · 2026-04-10 01:08:41

1.2k

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How to prove a particular set of differentiable functions is a subspace?

Published on 10 Apr 2026 - 1:08

score 88 · Answer 2 · 2026-04-14 09:01:35

88

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Can anyone explain the intuition behind this proof that a rational number exists between any two real numbers?

Published on 14 Apr 2026 - 9:01

score 248 · Answer 3 · 2026-04-20 15:42:49

248

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Formal Proof of WFF using Rules of Inference

Published on 20 Apr 2026 - 15:42

score 1k · Answer 4 · 2026-04-16 05:22:06

1k

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If a sequence of rational numbers converges to an irrational number, the sequence of their denominators is unbounded

Published on 16 Apr 2026 - 5:22

score 965 · Answer 5 · 2026-04-11 14:24:11

965

Views

How to prove $\sqrt{2}\in \Bbb{R}$ with Dedekind cuts?

Published on 11 Apr 2026 - 14:24

score 32 · Answer 6 · 2026-04-08 20:15:04

32

Views

Help with Logic proof writing?

Published on 08 Apr 2026 - 20:15

score 879 · Answer 7 · 2026-04-14 15:17:24

879

Views

Are Unions/Intersections of Cartesian Products of Indexed Sets "Distributive"?

Published on 14 Apr 2026 - 15:17

score 107 · Answer 8 · 2026-04-10 12:03:08

107

Views

How can I represent following series as a formula?

Published on 10 Apr 2026 - 12:03

score 150 · Answer 9 · 2026-04-14 13:36:39

150

Views

Prove if $v \in \text{span}(S)$, then $ \text{span}(S) = \text{span}(S ∪ \{v\})$

Published on 14 Apr 2026 - 13:36

score 51 · Answer 10 · 2026-04-15 02:49:27

51

Views

Prove there exists a member of a sequence that's less than the average.

Published on 15 Apr 2026 - 2:49

score 99 · Answer 11 · 2026-04-17 03:47:37

99

Views

Prove there is a rational q so that $|q-\sqrt{2}| < d - c$

Published on 17 Apr 2026 - 3:47

score 100 · Answer 12 · 2026-04-11 11:14:02

100

Views

Can A be proved using B when B was proved using A?

Published on 11 Apr 2026 - 11:14

score 44 · Answer 13 · 2026-04-17 14:33:02

44

Views

Prove $f^{−1}(T − Y ) = S − f^{-1}(Y )$.

Published on 17 Apr 2026 - 14:33

score 171 · Answer 14 · 2026-04-11 06:15:54

171

Views

Does the closure of natural numbers under addition need to be proven or is it an axiom?

Published on 11 Apr 2026 - 6:15

score 4.1k · Answer 15 · 2026-04-11 22:20:53

4.1k

Views

What does it mean when proof by contradiction doesn't lead to a contradiction?

Published on 11 Apr 2026 - 22:20

List Question

How to prove a particular set of differentiable functions is a subspace?

Can anyone explain the intuition behind this proof that a rational number exists between any two real numbers?

Formal Proof of WFF using Rules of Inference

If a sequence of rational numbers converges to an irrational number, the sequence of their denominators is unbounded

How to prove $\sqrt{2}\in \Bbb{R}$ with Dedekind cuts?

Help with Logic proof writing?

Are Unions/Intersections of Cartesian Products of Indexed Sets "Distributive"?

How can I represent following series as a formula?

Prove if $v \in \text{span}(S)$, then $ \text{span}(S) = \text{span}(S ∪ \{v\})$

Prove there exists a member of a sequence that's less than the average.

Prove there is a rational q so that $|q-\sqrt{2}| < d - c$

Can A be proved using B when B was proved using A?

Prove $f^{−1}(T − Y ) = S − f^{-1}(Y )$.

Does the closure of natural numbers under addition need to be proven or is it an axiom?

What does it mean when proof by contradiction doesn't lead to a contradiction?

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