Question

$R=\{ (a,b)\in A\times A\mid{}$ for every $X\subseteq A\smallsetminus\{a,b\}$, if $X \cup \{a\} \in F$ then $X\cup \{b\}\in F\} $ is transitive.

score 84 · Answer 1 · 2026-04-15 08:56:20

84

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$R=\{ (a,b)\in A\times A\mid{}$ for every $X\subseteq A\smallsetminus\{a,b\}$, if $X \cup \{a\} \in F$ then $X\cup \{b\}\in F\} $ is transitive.

Published on 15 Apr 2026 - 8:56

score 273 · Answer 2 · 2026-04-11 16:57:18

273

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How to understand the construction of these trigonometric polynomials?

Published on 11 Apr 2026 - 16:57

score 1.9k · Answer 3 · 2026-04-08 16:47:00

1.9k

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What is the difference between a formula and a proof?

Published on 08 Apr 2026 - 16:47

score 45 · Answer 4 · 2026-04-15 11:41:13

45

Views

Prove that $L(C_x)=L(C_y)$ when $I(C_x)=I(C_y)$

Published on 15 Apr 2026 - 11:41

score 198 · Answer 5 · 2026-04-12 10:57:21

198

Views

Clarifying the proof of Theorem 5 in Pratulananda Das's "Some further results on ideal convergence in topological spaces"

Published on 12 Apr 2026 - 10:57

score 274 · Answer 6 · 2026-04-16 21:28:40

274

Views

What is the significance of dividing the euclidean metric by $\sqrt{n}$?

Published on 16 Apr 2026 - 21:28

score 690 · Answer 7 · 2026-04-15 20:41:05

690

Views

Let $N$ be a finite subgroup of G. Show that $ gNg^-1 \subseteq N$ iff $gNg^-1 = N$

Published on 15 Apr 2026 - 20:41

score 46 · Answer 8 · 2026-04-11 15:00:45

46

Views

proof of theorem $7$ of Some further results on ideal convergence in topological spaces Pratulananda Das

Published on 11 Apr 2026 - 15:00

score 53 · Answer 9 · 2026-04-12 05:27:28

53

Views

What is the usual relationship between $L(x)$ and $I(C_x)\ ?$

Published on 12 Apr 2026 - 5:27

score 82 · Answer 10 · 2026-04-18 02:53:42

82

Views

Proof that ${n\choose r}$ always yields a natural number proof by induction

Published on 18 Apr 2026 - 2:53

score 877 · Answer 11 · 2026-04-17 07:21:32

877

Views

In metric space, show if a set is open, then its complement is closed.

Published on 17 Apr 2026 - 7:21

score 108 · Answer 12 · 2026-04-18 07:47:02

108

Views

Proving by induction that $\sum\limits_{k=2}^n \frac1{k^2}\le 1$

Published on 18 Apr 2026 - 7:47

score 68 · Answer 13 · 2026-04-16 14:50:49

68

Views

Why $A(d) = {\{x \ : \ 1 \le x \le p - 1 \ \ \text{and}\ \ \text{exp}_p(x) = d}\}$ are disjoint?

Published on 16 Apr 2026 - 14:50

score 77 · Answer 14 · 2026-04-14 17:10:04

77

Views

Find square and triangular numbers

Published on 14 Apr 2026 - 17:10

score 131 · Answer 15 · 2026-04-13 01:38:21

131

Views

How do I do this proof? $(A \cup B) - C = (A - C) \cup B \iff B \cap C = \emptyset$

Published on 13 Apr 2026 - 1:38

List Question

$R=\{ (a,b)\in A\times A\mid{}$ for every $X\subseteq A\smallsetminus\{a,b\}$, if $X \cup \{a\} \in F$ then $X\cup \{b\}\in F\} $ is transitive.

How to understand the construction of these trigonometric polynomials?

What is the difference between a formula and a proof?

Prove that $L(C_x)=L(C_y)$ when $I(C_x)=I(C_y)$

Clarifying the proof of Theorem 5 in Pratulananda Das's "Some further results on ideal convergence in topological spaces"

What is the significance of dividing the euclidean metric by $\sqrt{n}$?

Let $N$ be a finite subgroup of G. Show that $ gNg^-1 \subseteq N$ iff $gNg^-1 = N$

proof of theorem $7$ of Some further results on ideal convergence in topological spaces Pratulananda Das

What is the usual relationship between $L(x)$ and $I(C_x)\ ?$

Proof that ${n\choose r}$ always yields a natural number proof by induction

In metric space, show if a set is open, then its complement is closed.

Proving by induction that $\sum\limits_{k=2}^n \frac1{k^2}\le 1$

Why $A(d) = {\{x \ : \ 1 \le x \le p - 1 \ \ \text{and}\ \ \text{exp}_p(x) = d}\}$ are disjoint?

Find square and triangular numbers

How do I do this proof? $(A \cup B) - C = (A - C) \cup B \iff B \cap C = \emptyset$

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