Question

Use only the rules of inference to derive a logic statement

score 149 · Answer 1 · 2026-04-09 20:00:49

149

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Use only the rules of inference to derive a logic statement

Published on 09 Apr 2026 - 20:00

score 217 · Answer 2 · 2026-04-14 17:26:16

217

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Prove that a concatenation of two vector series, one of which is linearly independent, is linearly independent

Published on 14 Apr 2026 - 17:26

score 775 · Answer 3 · 2026-04-12 12:43:15

775

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Why do all elements commute in centre of an arbitrary finite group?

Published on 12 Apr 2026 - 12:43

score 2.1k · Answer 4 · 2026-04-16 05:29:09

2.1k

Views

Prove Cauchy-Schwarz with AM-GM for three variables

Published on 16 Apr 2026 - 5:29

score 1.8k · Answer 5 · 2026-04-16 04:38:20

1.8k

Views

Prove that any point on the perpendicular bisector of a line segment is equidistant from the endpoints of the line segment.

Published on 16 Apr 2026 - 4:38

score 964 · Answer 6 · 2026-04-14 16:22:17

964

Views

Prove that: If C ⊆ A and C ⊆ B then C ⊆ A∩B

Published on 14 Apr 2026 - 16:22

score 34 · Answer 7 · 2026-04-12 17:54:44

34

Views

Proving that trivial solution implies column sum to 1 via contrapositivity

Published on 12 Apr 2026 - 17:54

score 395 · Answer 8 · 2026-03-25 22:05:10

395

Views

Proving f is onto given if $g \circ f = h \circ f$, then g = h

Published on 25 Mar 2026 - 22:05

score 110 · Answer 9 · 2026-04-15 15:40:23

110

Views

Why are cases required in proofs? i.e. in the inequality $|\sqrt{x}-\sqrt{y}| \leq \sqrt{|x-y|}$?

Published on 15 Apr 2026 - 15:40

score 550 · Answer 10 · 2026-04-09 05:28:13

550

Views

Questions about proving $\lnot \lnot a = a$

Published on 09 Apr 2026 - 5:28

score 1k · Answer 11 · 2026-04-15 18:26:11

1k

Views

Why isn't this approach in solving $x^2+x+1=0$ valid?

Published on 15 Apr 2026 - 18:26

score 575 · Answer 12 · 2026-04-16 05:48:41

575

Views

For the additive group modulo $n$, what's the proof that the order of each element is given by $\frac{|G|}{\gcd(x,|G|)}$

Published on 16 Apr 2026 - 5:48

score 48 · Answer 13 · 2026-04-09 21:58:31

48

Views

Sufficient condition for an inequality to hold

Published on 09 Apr 2026 - 21:58

score 629 · Answer 14 · 2026-04-17 03:52:34

629

Views

Find a number which satisfies the equation $|x^6-3x^3+5x| \leq Q$ whenever $|x|$ $\leq$ $2$?

Published on 17 Apr 2026 - 3:52

score 341 · Answer 15 · 2026-04-15 20:43:20

341

Views

Root-$n$ consistency of an estimator implies its variance is $O(n^{-1})$

Published on 15 Apr 2026 - 20:43

List Question

Use only the rules of inference to derive a logic statement

Prove that a concatenation of two vector series, one of which is linearly independent, is linearly independent

Why do all elements commute in centre of an arbitrary finite group?

Prove Cauchy-Schwarz with AM-GM for three variables

Prove that any point on the perpendicular bisector of a line segment is equidistant from the endpoints of the line segment.

Prove that: If C ⊆ A and C ⊆ B then C ⊆ A∩B

Proving that trivial solution implies column sum to 1 via contrapositivity

Proving f is onto given if $g \circ f = h \circ f$, then g = h

Why are cases required in proofs? i.e. in the inequality $|\sqrt{x}-\sqrt{y}| \leq \sqrt{|x-y|}$?

Questions about proving $\lnot \lnot a = a$

Why isn't this approach in solving $x^2+x+1=0$ valid?

For the additive group modulo $n$, what's the proof that the order of each element is given by $\frac{|G|}{\gcd(x,|G|)}$

Sufficient condition for an inequality to hold

Find a number which satisfies the equation $|x^6-3x^3+5x| \leq Q$ whenever $|x|$ $\leq$ $2$?

Root-$n$ consistency of an estimator implies its variance is $O(n^{-1})$

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