Question

Understanding a solution in showing continuity by the inverse image of every open set is open for addition.

score 42 · Answer 1 · 2026-04-12 19:21:11

42

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Understanding a solution in showing continuity by the inverse image of every open set is open for addition.

Published on 12 Apr 2026 - 19:21

score 897 · Answer 2 · 2026-04-17 14:36:29

897

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Prove that for every real number x, there is a real number y such that for every real number z, yz = $(x + z)^2-(x^2+z^2)$

Published on 17 Apr 2026 - 14:36

score 169 · Answer 3 · 2026-04-09 10:52:14

169

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Question of proof of archimedean property

Published on 09 Apr 2026 - 10:52

score 244 · Answer 4 · 2026-04-08 22:36:29

244

Views

Manual square root method explained

Published on 08 Apr 2026 - 22:36

score 56 · Answer 5 · 2026-03-27 12:55:52

56

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Why two simplices become equal in the colimit

Published on 27 Mar 2026 - 12:55

score 451 · Answer 6 · 2026-04-25 10:35:35

451

Views

Whiskering a natural isomorphism yields a natural isomorphism

Published on 25 Apr 2026 - 10:35

score 51 · Answer 7 · 2026-04-14 06:28:11

51

Views

Proof for a recurrent sequence

Published on 14 Apr 2026 - 6:28

score 45 · Answer 8 · 2026-04-09 15:23:51

45

Views

Markov models: Proving that an occupation law is a stationary law

Published on 09 Apr 2026 - 15:23

score 58 · Answer 9 · 2026-04-10 00:06:58

58

Views

Analyzing logical forms clarification

Published on 10 Apr 2026 - 0:06

score 263 · Answer 10 · 2026-04-14 00:22:47

263

Views

Proof clarification(an algebraic geometric doubt): a torsor of an elliptic curve is a twist

Published on 14 Apr 2026 - 0:22

score 57 · Answer 11 · 2026-04-16 09:46:31

57

Views

Expanding $(1+x/j)^{-1}(1+1/j)^{x}$

Published on 16 Apr 2026 - 9:46

score 468 · Answer 12 · 2026-04-16 08:56:24

468

Views

Let S be a set. If $S$ has $n$ elements, then S has $2^n$ subsets proof

Published on 16 Apr 2026 - 8:56

score 106 · Answer 13 · 2026-04-15 16:41:55

106

Views

Proving that $\bigcap \mathcal P\subseteq\left(\bigcap\mathcal M\right)\cup\left(\bigcup\mathcal N\right)$

Published on 15 Apr 2026 - 16:41

score 108 · Answer 14 · 2026-04-15 20:36:50

108

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What theorem said that $L^2[a,b]$ is dense in $L^1[a,b]$ in Royden "Real analysis " 4th edition.

Published on 15 Apr 2026 - 20:36

score 109 · Answer 15 · 2026-04-14 17:10:23

109

Views

Why we take $U := \{ f \in L^2[a,b]: \|f\|_{L^2[a,b]} \leq 1 \}$?

Published on 14 Apr 2026 - 17:10

List Question

Understanding a solution in showing continuity by the inverse image of every open set is open for addition.

Prove that for every real number x, there is a real number y such that for every real number z, yz = $(x + z)^2-(x^2+z^2)$

Question of proof of archimedean property

Manual square root method explained

Why two simplices become equal in the colimit

Whiskering a natural isomorphism yields a natural isomorphism

Proof for a recurrent sequence

Markov models: Proving that an occupation law is a stationary law

Analyzing logical forms clarification

Proof clarification(an algebraic geometric doubt): a torsor of an elliptic curve is a twist

Expanding $(1+x/j)^{-1}(1+1/j)^{x}$

Let S be a set. If $S$ has $n$ elements, then S has $2^n$ subsets proof

Proving that $\bigcap \mathcal P\subseteq\left(\bigcap\mathcal M\right)\cup\left(\bigcup\mathcal N\right)$

What theorem said that $L^2[a,b]$ is dense in $L^1[a,b]$ in Royden "Real analysis " 4th edition.

Why we take $U := \{ f \in L^2[a,b]: \|f\|_{L^2[a,b]} \leq 1 \}$?

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