List questions from proof-writing

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A question regarding the didactic motive for making a proof more complicated than logically necessary.

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Partial fraction of complex polynomials : a linear algebra proof

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Sandwich rule and limits

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Finding closed form of exponential generating function

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223

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Finding closed form of exponential generating function involving identity permutation

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324

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Is it given that two lines are perpendicular if a right angle is shown?

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Finding exponential generating function

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71

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Probability Theory – Interesting Theoretical Task!!

Published on 26 Mar 2026 - 14:26

60

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Proof by induction when the first element is defined in an interval

Published on 10 Apr 2026 - 7:26

211

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Proof of a variational trace inequality

Published on 11 Apr 2026 - 13:05

522

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If $\left\{x_n\right\}$ is a convergent sequence of points in $[a, b]$ and $\lim x_n = c$, then $c\in[a, b]$

Published on 24 Apr 2026 - 6:50

188

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Piecewise Continuity and Integrability...

Published on 15 Apr 2026 - 8:19

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Collective noun for equalities and inequalities?

Published on 14 Apr 2026 - 2:39

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"Prove that a topology Ƭ on X is the discrete topology if and only if {x} ∈ Ƭ for all x ∈ X"

Published on 16 Apr 2026 - 1:19

List Question

What are the advantages of ending a proof with “QED”?

A question regarding the didactic motive for making a proof more complicated than logically necessary.

Partial fraction of complex polynomials : a linear algebra proof

Sandwich rule and limits

Finding closed form of exponential generating function

Finding closed form of exponential generating function involving identity permutation

Is it given that two lines are perpendicular if a right angle is shown?

Finding exponential generating function

Probability Theory – Interesting Theoretical Task!!

Proof by induction when the first element is defined in an interval

Proof of a variational trace inequality

If $\left\{x_n\right\}$ is a convergent sequence of points in $[a, b]$ and $\lim x_n = c$, then $c\in[a, b]$

Piecewise Continuity and Integrability...

Collective noun for equalities and inequalities?

"Prove that a topology Ƭ on X is the discrete topology if and only if {x} ∈ Ƭ for all x ∈ X"

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