Question

How to use Element-wise Proofs?

score 325 · Answer 1 · 2026-04-10 01:12:49

325

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How to use Element-wise Proofs?

Published on 10 Apr 2026 - 1:12

score 54 · Answer 2 · 2026-04-11 23:45:49

54

Views

Obtaining expression for recursive sequence

Published on 11 Apr 2026 - 23:45

score 90 · Answer 3 · 2026-04-13 07:16:04

90

Views

Is there a context-free but non regular language, which still meets the requirements of the regular pumping lemma?

Published on 13 Apr 2026 - 7:16

score 613 · Answer 4 · 2026-04-13 10:20:56

613

Views

Algebralization of a puzzle

Published on 13 Apr 2026 - 10:20

score 219 · Answer 5 · 2026-04-13 05:54:27

219

Views

How would I go about proving that the language accepted by a regular expression is subset of the language accepted by a context free grammar?

Published on 13 Apr 2026 - 5:54

score 190 · Answer 6 · 2026-04-14 23:59:30

190

Views

What would a function $F:\mathbb{N} \times \mathbb{N} \rightarrow \{0, 1\}$ look like?

Published on 14 Apr 2026 - 23:59

score 4.5k · Answer 7 · 2026-04-09 00:58:15

4.5k

Views

Least and most significant bit calculation using bitwise operations

Published on 09 Apr 2026 - 0:58

score 162 · Answer 8 · 2026-04-14 20:17:47

162

Views

Prove $\sum_{r=2}^n {n \choose r} r(r-1) = n(n-1)2^{n-2}$ for $n\geq 2$

Published on 14 Apr 2026 - 20:17

score 497 · Answer 9 · 2026-04-15 18:34:30

497

Views

How many triangles has a complete graph. Recursive Equation

Published on 15 Apr 2026 - 18:34

score 75 · Answer 10 · 2026-04-13 07:00:49

75

Views

Solving this inequality involving permutation.

Published on 13 Apr 2026 - 7:00

score 588 · Answer 11 · 2026-04-15 09:38:48

588

Views

Let $ A =\{n\in\mathbb{Z}: 2 | n\}$ and $B=\{n\in\mathbb{Z}: 4 | n\}$. Prove that $n\in (A - B)$ if and only if $n=2k$ for some odd integer k.

Published on 15 Apr 2026 - 9:38

score 27 · Answer 12 · 2026-04-09 08:56:33

27

Views

Easiest way to compute large set of numbers

Published on 09 Apr 2026 - 8:56

score 246 · Answer 13 · 2026-04-14 22:03:41

246

Views

Help finding a combinatorial proof of ${kn \choose 2}= k{n \choose 2}+n^2{k \choose 2}$

Published on 14 Apr 2026 - 22:03

score 66 · Answer 14 · 2026-04-12 18:19:35

66

Views

Counting Logic for Subsets, Password Combination, etc. Need clarification if my understanding is correct to approach these scenarios?

Published on 12 Apr 2026 - 18:19

score 22 · Answer 15 · 2026-04-15 02:48:55

22

Views

To find the different line-ups the team can make.

Published on 15 Apr 2026 - 2:48

List Question

How to use Element-wise Proofs?

Obtaining expression for recursive sequence

Is there a context-free but non regular language, which still meets the requirements of the regular pumping lemma?

Algebralization of a puzzle

How would I go about proving that the language accepted by a regular expression is subset of the language accepted by a context free grammar?

What would a function $F:\mathbb{N} \times \mathbb{N} \rightarrow \{0, 1\}$ look like?

Least and most significant bit calculation using bitwise operations

Prove $\sum_{r=2}^n {n \choose r} r(r-1) = n(n-1)2^{n-2}$ for $n\geq 2$

How many triangles has a complete graph. Recursive Equation

Solving this inequality involving permutation.

Let $ A =\{n\in\mathbb{Z}: 2 | n\}$ and $B=\{n\in\mathbb{Z}: 4 | n\}$. Prove that $n\in (A - B)$ if and only if $n=2k$ for some odd integer k.

Easiest way to compute large set of numbers

Help finding a combinatorial proof of ${kn \choose 2}= k{n \choose 2}+n^2{k \choose 2}$

Counting Logic for Subsets, Password Combination, etc. Need clarification if my understanding is correct to approach these scenarios?

To find the different line-ups the team can make.

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