List questions from solution-verification

Published on 16 Dec 2019 - 23:07

43

Views

Uncertainty proving statement via contradiction

Published on 16 Dec 2019 - 23:53

206

Views

interchanging sup and integral

Published on 17 Dec 2019 - 5:33

645

Views

Doubt on a fake proof of $e^{i\pi}=-1$.

Published on 26 Mar 2026 - 19:17

832

Views

Is this proof of $\mathcal{L}\{\sin{at}\}=\frac{a}{s^2+a^2}$ valid?

Published on 17 Dec 2019 - 7:47

256

Views

Proving a function is differentiable at 1 point, but discontinuous everywhere else

Published on 17 Dec 2019 - 9:11

461

Views

Proof that gcd(n1, .... , nk) = gcd(n1, gcd(n2,...,nk))

Published on 28 Mar 2026 - 12:57

181

Views

On the infinite product of negative ones

Published on 26 Mar 2026 - 19:18

282

Views

Feedback on proof of "clipping a convex N-polygon creates a convex polygon with at most N+1 vertices"

Published on 17 Dec 2019 - 11:40

223

Views

Properties of functions in $C^{\infty}(\mathbb{R})$ with compact support $K$

Published on 17 Dec 2019 - 12:05

119

Views

Questions on $A^mBA^n=I$ and $\small B=\left[\begin{smallmatrix}1&-1&3&1\\1&1&2&1\\2&-1&3&2\\-1&-2&1&2\end{smallmatrix}\right]$

Published on 17 Dec 2019 - 15:55

470

Views

abel's test proof

Published on 17 Dec 2019 - 16:31

147

Views

Computing the minimal polynomial (field extension)

Published on 17 Dec 2019 - 16:43

41

Views

Basic question about expectation

Published on 17 Dec 2019 - 18:18

94

Views

Applying the Picard-Lindelöf theorem

Published on 17 Dec 2019 - 23:19

List Question

Fourier Transform of indicator function of a cuboid

Uncertainty proving statement via contradiction

interchanging sup and integral

Doubt on a fake proof of $e^{i\pi}=-1$.

Is this proof of $\mathcal{L}\{\sin{at}\}=\frac{a}{s^2+a^2}$ valid?

Proving a function is differentiable at 1 point, but discontinuous everywhere else

Proof that gcd(n1, .... , nk) = gcd(n1, gcd(n2,...,nk))

On the infinite product of negative ones

Feedback on proof of "clipping a convex N-polygon creates a convex polygon with at most N+1 vertices"

Properties of functions in $C^{\infty}(\mathbb{R})$ with compact support $K$

Questions on $A^mBA^n=I$ and $\small B=\left[\begin{smallmatrix}1&-1&3&1\\1&1&2&1\\2&-1&3&2\\-1&-2&1&2\end{smallmatrix}\right]$

abel's test proof

Computing the minimal polynomial (field extension)

Basic question about expectation

Applying the Picard-Lindelöf theorem

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