Question

Suppose $A \subset V$. How does a deformation retraction of $V$ onto $A$ induces a deformation retraction of $V/A$ onto $A/A$?

score 211 · Answer 1 · 2026-04-09 06:21:13

211

Views

Suppose $A \subset V$. How does a deformation retraction of $V$ onto $A$ induces a deformation retraction of $V/A$ onto $A/A$?

Published on 09 Apr 2026 - 6:21

score 78 · Answer 2 · 2026-04-11 06:04:18

78

Views

What's wrong in this proof of 1=2?

Published on 11 Apr 2026 - 6:04

score 561 · Answer 3 · 2026-04-14 08:51:54

561

Views

Proof. Maximum of the closure is equal to the supremum of the set

Published on 14 Apr 2026 - 8:51

score 52 · Answer 4 · 2026-04-13 08:40:37

52

Views

Why is ${\varphi}^{-1} (A)$ closed in $V$?

Published on 13 Apr 2026 - 8:40

score 98 · Answer 5 · 2026-04-16 00:26:29

98

Views

Proof regarding the square root of a natural number $m>1$ and a prime number $p$, when $p \nmid m$

Published on 16 Apr 2026 - 0:26

score 118 · Answer 6 · 2026-04-22 17:02:10

118

Views

Help understanding how to show a field extension is a Galois extension .

Published on 22 Apr 2026 - 17:02

score 240 · Answer 7 · 2026-04-15 08:35:58

240

Views

Prove that any closed irreducible subset of $\mathrm {Spec} (R)$ has a unique generic point.

Published on 15 Apr 2026 - 8:35

score 155 · Answer 8 · 2026-04-11 06:03:36

155

Views

Proof of patterns in Fibonacci words

Published on 11 Apr 2026 - 6:03

score 291 · Answer 9 · 2026-04-14 19:37:43

291

Views

Prove that for every $n$, the binary representation of $n + 1$ contains exactly one bit that flips from $0$ to $1$

Published on 14 Apr 2026 - 19:37

score 609 · Answer 10 · 2026-04-16 00:19:27

609

Views

Palindrome Fibonacci words

Published on 16 Apr 2026 - 0:19

score 73 · Answer 11 · 2026-04-26 19:59:54

73

Views

Proof and notations

Published on 26 Apr 2026 - 19:59

score 54 · Answer 12 · 2026-04-13 04:24:16

54

Views

Issues relating formulas to functions for use in proving bijectives.

Published on 13 Apr 2026 - 4:24

score 209 · Answer 13 · 2026-04-12 13:35:10

209

Views

Can the value of the Riemann zeta function at $n=2$ be derived from the Wallis formula for $\pi$?

Published on 12 Apr 2026 - 13:35

score 56 · Answer 14 · 2026-04-15 19:59:56

56

Views

Prove that $\mathcal {C}$ is an affine algebraic $K$-variety.

Published on 15 Apr 2026 - 19:59

score 216 · Answer 15 · 2026-04-15 12:20:40

216

Views

Cluster point of a sequence is limit of a subsequence

Published on 15 Apr 2026 - 12:20

List Question

Suppose $A \subset V$. How does a deformation retraction of $V$ onto $A$ induces a deformation retraction of $V/A$ onto $A/A$?

What's wrong in this proof of 1=2?

Proof. Maximum of the closure is equal to the supremum of the set

Why is ${\varphi}^{-1} (A)$ closed in $V$?

Proof regarding the square root of a natural number $m>1$ and a prime number $p$, when $p \nmid m$

Help understanding how to show a field extension is a Galois extension .

Prove that any closed irreducible subset of $\mathrm {Spec} (R)$ has a unique generic point.

Proof of patterns in Fibonacci words

Prove that for every $n$, the binary representation of $n + 1$ contains exactly one bit that flips from $0$ to $1$

Palindrome Fibonacci words

Proof and notations

Issues relating formulas to functions for use in proving bijectives.

Can the value of the Riemann zeta function at $n=2$ be derived from the Wallis formula for $\pi$?

Prove that $\mathcal {C}$ is an affine algebraic $K$-variety.

Cluster point of a sequence is limit of a subsequence

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