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Pjotr5

Mathematics student from Amsterdam.

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  • Amsterdam, Nederland
  • math.stackexchange.com
  • Member for 6 years, 7 months
  • 156 profile views
  • Last seen 5 hours ago

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16 Equivalent norms understanding proof visually Aug 5 '16
11 irrationality proof of $\sqrt{n}+\sqrt{n+1}$ for any $n>0$ Aug 8 '16
9 Digit-Sum of a Number. Jun 29 '17
7 Is the distance function differentiable? Jun 16 '14
7 How many ways a 9 digit number can be formed using the digits 1 t0 9 without repetition such that it is divisble by $11$. Jun 30 '16
6 $P(n)$ is the product of two digits in the integer $n$ Jun 15 '15
6 A question about the odd sized minors of a certain matrix Jul 13 '15
5 A combinatorial interpretation of a counting problen Aug 4 '16
5 To find positive integers $n$ such that $\dfrac {n(n+1)(n+2)}6$ is a perfect square Jul 1 '15
5 Galois Group of $x^4+12x^3+44x^2+48x+40\in\mathbb{Q}[x]$ Jun 27 '17
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