User Empy2 - Mathematics Stack Exchange

Empy2

Member for 10 years, 5 months
Last seen this week

Adelaide, Australia

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80

Is every integer representable as the sum of four Fibonacci squares?

Jul 19

34

Prove there are no prime numbers in the sequence $a_n=10017,100117,1001117,10011117, \dots$

Mar 23, 2016

30

question about prime numbers

Nov 7, 2015

29

Why did Euler use e to represent complex numbers?

Apr 13, 2015

27

What is the limit of $x/(x+\sin x)$ as $x$ approaches infinity?

Jan 20, 2015

Questions

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25

Fibonacci-related sum

Jan 9, 2015

15

Narcissistic numbers in other bases

Jun 21, 2013

9

Guess the number of a liar

May 17, 2014

9

Binomial sum gives $4^n$

Jan 1, 2016

8

Rearrangement of dinner guests

Jun 10, 2013

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calculus

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192

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combinatorics

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elementary-number-theory

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131

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sequences-and-series

367

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158

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probability

308

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192

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+128

Conjecture: Given any five points, we can always draw a pair of non-intersecting circles whose diameter endpoints are four of those points.

+260

A question of random points in a square and probability of intersection of their line segments

+10

Under which conditions the integer expression $m(n-m)(n-5m)$ has 3 distinct prime factors?

+10

Tiling a unit square with rectangles of area $\frac 1k \times \frac{1}{k+1}$ but not with those side lengths - any references (Web, book, etc.)?

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Sep 11, 2014

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Jun 18, 2019
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Mar 22, 2015

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prime-numbers

Mar 23, 2016
complex-numbers

Nov 14, 2020
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Jun 18, 2020

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