List questions from proof-explanation

Published on 04 Jul 2019 - 22:10

355

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Clarification on Möbius inversion formula proof.

Published on 25 Mar 2026 - 7:56

262

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How do I prove that the set of rational functions is closed under composition by structural induction?

Published on 01 Apr 2026 - 19:08

997

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Pigeon Hole Principle And Infinite Sets

Published on 08 Apr 2026 - 21:28

382

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Cardinality of Perfect Polish Spaces

Published on 07 Apr 2026 - 2:16

204

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Properties of a linear system on a K3 surface

Published on 08 Apr 2026 - 21:08

67

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Show $D = \{f \in C^{2}[0,1]): f(x) > 0, \ \forall x \in [0,1], \|f'\|_{\infty}<1, |f''(0)| > 2\}$ is open w.r.t Sup Norm. Full Proof Verification

Published on 06 Jul 2019 - 20:34

111

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Proposition $8.3$ - Fundamental groups and covering spaces by Elon Lages Lima

Published on 30 Mar 2026 - 15:53

43

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Could someone please point out the mistake I'm making calculating this connection coefficient?

Published on 25 Mar 2026 - 15:40

182

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Baby Rudin's 1.35 (Schwarz inequality)

Published on 08 Jul 2019 - 8:06

138

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Show that $\sum_{cyc} \sqrt{8a+b^3}\ge 9$

Published on 25 Mar 2026 - 8:07

318

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The difference between proving the existence of the inverse of the fundamental group between a book and a youtube lecture.

Published on 25 Mar 2026 - 17:42

1k

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Norm of ideals in the ring of integers

Published on 08 Jul 2019 - 20:22

112

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$D$ a divisor numerically 1-connected implies that $H^0(\mathcal{O}_D)$=constants

Published on 25 Mar 2026 - 9:35

90

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How does this proof about the the coloring of a Graph work?

Published on 09 Jul 2019 - 21:40

List Question

Tail $\sigma$-algebra and a sequence of random variables

Clarification on Möbius inversion formula proof.

How do I prove that the set of rational functions is closed under composition by structural induction?

Pigeon Hole Principle And Infinite Sets

Cardinality of Perfect Polish Spaces

Properties of a linear system on a K3 surface

Show $D = \{f \in C^{2}[0,1]): f(x) > 0, \ \forall x \in [0,1], \|f'\|_{\infty}<1, |f''(0)| > 2\}$ is open w.r.t Sup Norm. Full Proof Verification

Proposition $8.3$ - Fundamental groups and covering spaces by Elon Lages Lima

Could someone please point out the mistake I'm making calculating this connection coefficient?

Baby Rudin's 1.35 (Schwarz inequality)

Show that $\sum_{cyc} \sqrt{8a+b^3}\ge 9$

The difference between proving the existence of the inverse of the fundamental group between a book and a youtube lecture.

Norm of ideals in the ring of integers

$D$ a divisor numerically 1-connected implies that $H^0(\mathcal{O}_D)$=constants

How does this proof about the the coloring of a Graph work?

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