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Martin van IJcken

Maths and physics undergraduate at the University of Groningen

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4 Why is $\int x^2e^{x^2}\,d(x^2)$ not proper notation? Oct 30 '20
3 Why does $\sum_{k=0}^{n} (-1)^k {n \choose k} = 0$ if $n\neq 0$ and 1 otherwise? Jan 14
2 Is it a general truth that when two equations can be described with the same sentence, only varying intonation they are equivalent? Nov 12 '20
1 How do I notate "the x-coördinate of $G^{-1}(z)$ for $z = G(x, y) : \mathbb{N}\times\mathbb{N} \to \mathbb{N}$ Nov 16 '20
1 How can all matrices have a _unique_ reduced row echelon form? Nov 17 '20
1 If we want to use proof by contradiction, shouldn't we first proof that a statement is either true or false? Nov 24 '20
1 Why do we assume the set of all sets that do not contain themselves exists? Dec 20 '20
1 Why does $\cot(2\arctan(Ax))=\frac{1-(Ax)^2}{2Ax}$ Apr 4 '20
1 Why does $\sum_{k=0}^{n} (-1)^k {n \choose k} = 0$ if $n\neq 0$ and 1 otherwise? [duplicate] Jan 14
1 If $f(nx)=f(x)^n$ then $f(x+y)=f(x)f(y)$ Nov 13 '20
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