List questions from proof-explanation

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Projection on $U$ along $W$ with $U,W$ contained in $V=U\oplus W$

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What do first derivatives, factorials, and alternating signs have to do with explicit and recursive forms of sequences?

Published on 14 Apr 2026 - 1:34

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Prove that if MST T1 has k edges with weight 1 then T2 has also k edges with weight 1

Published on 16 Apr 2026 - 1:22

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Understanding Fraleigh's derivation of Fermat's Little Theorem

Published on 09 Apr 2026 - 22:11

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Proof of $\sup|f(x)|=\left \| f \right \|_\infty $

Published on 18 Apr 2026 - 23:24

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Determining if a function $f:C[0,1]\rightarrow M_{2,2}$ is surjective, injective or bijective

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Finding a complement of $U=\{f\in C(\mathbb{R},\mathbb{R}) |f(0)=0\}$

Published on 21 Apr 2026 - 20:22

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Some doubts about Levy's Continuity Theorem proof - Convergence results

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Proving that the dot product $\mathbb{R}^n\times \mathbb{R}^n\mapsto\mathbb{R}$ is bilinear

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Limit in Proving Brouwer's Fixed Point using Sperner's Lemma

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Olympiad Number theory Problem Solution Doubt

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Proof verification and explanation in probability

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Signed measure: verification

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Calculus proof of ln(ab)= lna + lnb

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Doubt in a part of the proof of Bolzano-Weierstraß Theorem

Projection on $U$ along $W$ with $U,W$ contained in $V=U\oplus W$

What do first derivatives, factorials, and alternating signs have to do with explicit and recursive forms of sequences?

Prove that if MST T1 has k edges with weight 1 then T2 has also k edges with weight 1

Understanding Fraleigh's derivation of Fermat's Little Theorem

Proof of $\sup|f(x)|=\left \| f \right \|_\infty $

Determining if a function $f:C[0,1]\rightarrow M_{2,2}$ is surjective, injective or bijective

Finding a complement of $U=\{f\in C(\mathbb{R},\mathbb{R}) |f(0)=0\}$

Some doubts about Levy's Continuity Theorem proof - Convergence results

Proving that the dot product $\mathbb{R}^n\times \mathbb{R}^n\mapsto\mathbb{R}$ is bilinear

Limit in Proving Brouwer's Fixed Point using Sperner's Lemma

Olympiad Number theory Problem Solution Doubt

Proof verification and explanation in probability

Signed measure: verification

Calculus proof of ln(ab)= lna + lnb

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