# Ewan Delanoy

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## Connected metric spaces with disjoint open balls

May 25 '13 at 3:02

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## Number of simple edge-disjoint paths needed to cover a planar graph

Jul 16 '14 at 7:02

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## Two curious “identities” on $x^x$,$e$,and $\pi$

Nov 26 '12 at 15:22

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## Alice and Bob matrix problem.

Oct 30 '12 at 18:52

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## Triangular Factorials

Nov 23 '12 at 19:53

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## Inequality for expected value

Mar 19 '12 at 12:47

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## What is the sum of sum of digits of $4444^{4444^{4444}}$?

Aug 24 '13 at 11:08

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## Is this sequence unbounded?

Jan 20 '13 at 4:59

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## Does $2x^2-1=y^5$ have a solution in integers, with $y>1$?

Feb 20 '12 at 15:33

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## Mind maps of Advanced Mathematics and various branches thereof

Mar 9 '13 at 14:22

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## Square matrices satisfying certain relations must have dimension divisible by $3$

Feb 26 '13 at 10:26

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## When is a sum of consecutive squares equal to a square?

Jul 30 '14 at 18:02

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## How did Ramanujan get this result?

Jun 20 '12 at 13:21

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## Finding the fraction $\frac{a^5+b^5+c^5+d^5}{a^6+b^6+c^6+d^6}$ when knowing the sums $a+b+c+d$ to $a^4+b^4+c^4+d^4$

May 28 '13 at 4:30

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## How prove this sum $\sum_{n=1}^{\infty}\binom{2n}{n}\frac{(-1)^{n-1}H_{n+1}}{4^n(n+1)}$

Jul 23 '14 at 3:25

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