List questions from proof-verification

Published on 29 Mar 2026 - 8:18

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A nontrivial solution to polynomial $k[x_1,\ldots, x_n ]$

Published on 31 Mar 2026 - 12:44

35

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Proof verification for no int solution in cubic

Published on 25 Mar 2026 - 1:15

262

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Closed form/ meaning of sum of geometric series of operator exponentials

Published on 22 Mar 2026 - 16:09

1.4k

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Showing that a Set in $\mathbb{R}^2$ is not bounded.

Published on 26 Apr 2018 - 10:15

454

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Spivak Chapter 13 Problem 34 Proof $\lim_{x \to \infty} 1/x \int_{0}^{x}f(t) dt =a $

Published on 26 Apr 2018 - 15:02

387

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Proof Verification: Tao, Analysis I: Lemma 5.3.14.

Published on 26 Apr 2018 - 17:05

1.3k

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Symmetric linear operator is bounded

Published on 26 Mar 2026 - 12:32

85

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Set theory - Logic proof verification

Published on 26 Apr 2018 - 17:34

1.7k

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Why do all the Platonic Solids exist?

Published on 20 Mar 2026 - 21:15

5.3k

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Every nonempty subset of $\mathbb{N}$ has a smallest element.

Published on 26 Mar 2026 - 20:38

33

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If $f:X\to Y$ with $A_{1},A_{2}\subset X$, show that $f(A_{1}\cup A_{2})=f(A_{1})\cup f(A_{2})$.

Published on 27 Apr 2018 - 0:56

278

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Epsilon-Delta proof of sum of two continuous functions.

Published on 25 Mar 2026 - 9:49

1.5k

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Proving that self-adjoint commuting linear operators have a simultaneous orthonormal eigenbasis

Published on 27 Apr 2018 - 11:03

332

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exam problem on continuity

Published on 27 Apr 2018 - 13:59

List Question

An implication concerning $\operatorname{range}T\cap\operatorname{null}T = \{0\}$

A nontrivial solution to polynomial $k[x_1,\ldots, x_n ]$

Proof verification for no int solution in cubic

Closed form/ meaning of sum of geometric series of operator exponentials

Showing that a Set in $\mathbb{R}^2$ is not bounded.

Spivak Chapter 13 Problem 34 Proof $\lim_{x \to \infty} 1/x \int_{0}^{x}f(t) dt =a $

Proof Verification: Tao, Analysis I: Lemma 5.3.14.

Symmetric linear operator is bounded

Set theory - Logic proof verification

Why do all the Platonic Solids exist?

Every nonempty subset of $\mathbb{N}$ has a smallest element.

If $f:X\to Y$ with $A_{1},A_{2}\subset X$, show that $f(A_{1}\cup A_{2})=f(A_{1})\cup f(A_{2})$.

Epsilon-Delta proof of sum of two continuous functions.

Proving that self-adjoint commuting linear operators have a simultaneous orthonormal eigenbasis

exam problem on continuity

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