Question

$\Sigma ; \lnot \alpha \vdash k $. Prove that $\Sigma \vdash \alpha$

score 72 · Answer 1 · 2026-04-14 19:22:04

72

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$\Sigma ; \lnot \alpha \vdash k $. Prove that $\Sigma \vdash \alpha$

Published on 14 Apr 2026 - 19:22

score 46 · Answer 2 · 2026-04-17 06:09:38

46

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Player has $10$ free throws, $P($single throw$)=p$. Let $ Y $ be the longest continuous string of hits and the $ X$ number of hits. $P(X= 7|Y=5)$=?

Published on 17 Apr 2026 - 6:09

score 94 · Answer 3 · 2026-04-15 21:14:31

94

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Is my proof of if $B \subseteq A$ then $P(B) \setminus P(A) = \emptyset$ correct?

Published on 15 Apr 2026 - 21:14

score 163 · Answer 4 · 2026-04-12 23:23:00

163

Views

How to prove $x^n$ has no limit for $x\leq -1$

Published on 12 Apr 2026 - 23:23

score 67 · Answer 5 · 2026-04-15 19:35:06

67

Views

Help understanding what's needed in this proof to show that H is a subgroup.

Published on 15 Apr 2026 - 19:35

score 151 · Answer 6 · 2026-04-12 07:41:49

151

Views

How to prove an irrational exponential number with its exponent divisors also leading to irrational exponential numbers

Published on 12 Apr 2026 - 7:41

score 1k · Answer 7 · 2026-03-25 12:15:26

1k

Views

proving transcendental numbers are irrational

Published on 25 Mar 2026 - 12:15

score 137 · Answer 8 · 2026-04-13 11:09:33

137

Views

Why can't I find the value of $x$ using logarithms?

Published on 13 Apr 2026 - 11:09

score 57 · Answer 9 · 2026-04-17 02:16:07

57

Views

How to write that if $b_n = 0$ or $b_n = a_n$ and the serie of $a_n$ converges and is positive, then $b_n$ is also positive converges

Published on 17 Apr 2026 - 2:16

score 96 · Answer 10 · 2026-04-17 13:56:06

96

Views

Is it wrong to deduce the premise from the conclusion?

Published on 17 Apr 2026 - 13:56

score 951 · Answer 11 · 2026-04-17 12:27:31

951

Views

Does this proof contain circular logic?

Published on 17 Apr 2026 - 12:27

score 687 · Answer 12 · 2026-04-14 04:40:28

687

Views

Trigonometric Identities: Given that $2\cos(3a)=\cos(a)$ find $\cos(2a)$

Published on 14 Apr 2026 - 4:40

score 38 · Answer 13 · 2026-04-10 12:02:29

38

Views

Properties of two solutions of free fall ODE

Published on 10 Apr 2026 - 12:02

score 44 · Answer 14 · 2026-04-10 03:00:33

44

Views

How to continue this proof about Powersets?

Published on 10 Apr 2026 - 3:00

score 106 · Answer 15 · 2026-04-17 18:38:26

106

Views

Proving a measure is addtive but not $\sigma-\text{addtive}$

Published on 17 Apr 2026 - 18:38

List Question

$\Sigma ; \lnot \alpha \vdash k $. Prove that $\Sigma \vdash \alpha$

Player has $10$ free throws, $P($single throw$)=p$. Let $ Y $ be the longest continuous string of hits and the $ X$ number of hits. $P(X= 7|Y=5)$=?

Is my proof of if $B \subseteq A$ then $P(B) \setminus P(A) = \emptyset$ correct?

How to prove $x^n$ has no limit for $x\leq -1$

Help understanding what's needed in this proof to show that H is a subgroup.

How to prove an irrational exponential number with its exponent divisors also leading to irrational exponential numbers

proving transcendental numbers are irrational

Why can't I find the value of $x$ using logarithms?

How to write that if $b_n = 0$ or $b_n = a_n$ and the serie of $a_n$ converges and is positive, then $b_n$ is also positive converges

Is it wrong to deduce the premise from the conclusion?

Does this proof contain circular logic?

Trigonometric Identities: Given that $2\cos(3a)=\cos(a)$ find $\cos(2a)$

Properties of two solutions of free fall ODE

How to continue this proof about Powersets?

Proving a measure is addtive but not $\sigma-\text{addtive}$

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