Question

(Verification) If $A \subsetneq B$, and $B \subsetneq C$, then $A \subsetneq C$

score 157 · Answer 1 · 2026-04-15 21:15:57

157

Views

(Verification) If $A \subsetneq B$, and $B \subsetneq C$, then $A \subsetneq C$

Published on 15 Apr 2026 - 21:15

score 46 · Answer 2 · 2026-03-25 05:59:59

46

Views

Does congruent triangles apply to this question?

Published on 25 Mar 2026 - 5:59

score 77 · Answer 3 · 2026-04-16 00:04:18

77

Views

ED-problem solving by graph

Published on 16 Apr 2026 - 0:04

score 93 · Answer 4 · 2026-04-13 13:06:45

93

Views

A question in real analysis related to connectedness

Published on 13 Apr 2026 - 13:06

score 147 · Answer 5 · 2026-04-16 04:14:58

147

Views

Show that the given sequence is convergent in $(C[0,1],\|\|_1 )$ but not in $(C[0,1], \|\|_\infty)$

Published on 16 Apr 2026 - 4:14

score 334 · Answer 6 · 2026-04-10 08:44:48

334

Views

Proof verification: Baby Rudin Chapter 4 Exercise 8

Published on 10 Apr 2026 - 8:44

score 143 · Answer 7 · 2026-04-14 13:32:13

143

Views

Proof of Absolute Convergence of $\sum\limits_{n=1}^{\infty} (-1)^{n-1}\tan\left(\frac{1}{n\sqrt{n}}\right)$

Published on 14 Apr 2026 - 13:32

score 36 · Answer 8 · 2026-04-13 16:06:32

36

Views

Is this argument valid?(infinite matrix)

Published on 13 Apr 2026 - 16:06

score 76 · Answer 9 · 2026-04-17 18:49:51

76

Views

Prove $\overline{R^T}=\overline{R}^T$

Published on 17 Apr 2026 - 18:49

score 117 · Answer 10 · 2026-04-15 16:36:50

117

Views

Is my proof of the identity $\sum_{n=0}^{\infty}\ln(1+x^{2^n})=-\ln(1-x)$ correct?

Published on 15 Apr 2026 - 16:36

score 40 · Answer 11 · 2026-04-14 10:21:43

40

Views

Show that if $x_1,...,x_r \in U$ and $y_1,...,y_s \in U'$ are both linear independent systems...

Published on 14 Apr 2026 - 10:21

score 89 · Answer 12 · 2026-04-10 16:31:58

89

Views

Let $A = \mathbb{Z} \times \mathbb{Z} \times \mathbb{Z} \times \cdots~$ and let $R$ be the ring of all group endomorphisms from $A \to A$.

Published on 10 Apr 2026 - 16:31

score 710 · Answer 13 · 2026-04-15 01:10:30

710

Views

Show that $\cos\big(\frac{2\pi}{n}\big)$ is an algebraic number

Published on 15 Apr 2026 - 1:10

score 211 · Answer 14 · 2026-04-12 21:03:40

211

Views

Prove if the chord joining the points of tangency of two tangents to a parabola goes through the focus, the tangents are perpendicular

Published on 12 Apr 2026 - 21:03

score 217 · Answer 15 · 2026-04-14 17:17:35

217

Views

Proof of existence of exponential function defining $\exp(1)$ how to aproach

Published on 14 Apr 2026 - 17:17

List Question

(Verification) If $A \subsetneq B$, and $B \subsetneq C$, then $A \subsetneq C$

Does congruent triangles apply to this question?

ED-problem solving by graph

A question in real analysis related to connectedness

Show that the given sequence is convergent in $(C[0,1],\|\|_1 )$ but not in $(C[0,1], \|\|_\infty)$

Proof verification: Baby Rudin Chapter 4 Exercise 8

Proof of Absolute Convergence of $\sum\limits_{n=1}^{\infty} (-1)^{n-1}\tan\left(\frac{1}{n\sqrt{n}}\right)$

Is this argument valid?(infinite matrix)

Prove $\overline{R^T}=\overline{R}^T$

Is my proof of the identity $\sum_{n=0}^{\infty}\ln(1+x^{2^n})=-\ln(1-x)$ correct?

Show that if $x_1,...,x_r \in U$ and $y_1,...,y_s \in U'$ are both linear independent systems...

Let $A = \mathbb{Z} \times \mathbb{Z} \times \mathbb{Z} \times \cdots~$ and let $R$ be the ring of all group endomorphisms from $A \to A$.

Show that $\cos\big(\frac{2\pi}{n}\big)$ is an algebraic number

Prove if the chord joining the points of tangency of two tangents to a parabola goes through the focus, the tangents are perpendicular

Proof of existence of exponential function defining $\exp(1)$ how to aproach

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