Mathematics
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The Pointer

Apparently, this user prefers to keep an air of mystery about them.

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17 What's the difference between interior and relative interior? May 9 '18
15 Why/How does the determinant of the Hessian matrix, combined with the 2nd derivatives, tell us max., min., saddle points? Reasoning behind it? Oct 26 '16
12 “An affine space is nothing more than a vector space whose origin we try to forget about, by adding translations to the linear maps.” Jan 29 '20
10 Applying the Fourier transform to Maxwell's equations May 24 '19
10 Proof that the dimension of a matrix row space is equal to the dimension of its column space Aug 22 '16
9 Determining Whether the Number $11111$ is Prime. Used Divisibility Tests. Aug 23 '18
9 Consistency of ZFC and proof by contradiction Feb 9 '17
7 Proof: For any integer $n$ with $n \ge 1$, the number of permutations of a set with $n$ elements is $n!$. Dec 28 '18
7 Gambler coin problem: fair coin and two-headed coin Aug 25 '19
7 Find the adjoint under the inner product $\langle f, g \rangle = \int_0^1 f(t)g(t)t \ dt$ of $\mathcal{L}(f)(t) = \frac{d^2 f}{dt^2} + f$. Oct 30 '17
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