Quixotic
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### Questions (350)

 36 How does the divisibility graphs work? 30 A pencil approach to find $\sum \limits_{i=1}^{69} \sqrt{\left( 1+\frac{1}{i^2}+\frac{1}{(i+1)^2}\right)}$ 29 Checking if a number is a Fibonacci or not? 27 Proving : $\bigl(1+\frac{1}{n+1}\bigr)^{n+1} \gt (1+\frac{1}{n})^{n}$ 23 Find the number of pairs of positive integers $(a, b)$ such that $a!+b! = a^b$

### Reputation (9,369)

 +5 Drawing heart in mathematica +20 How many ways are there for 8 men and 5 women to stand in a line so that no two women stand next to each other? +15 How can we sum up $\sin$ and $\cos$ series when the angles are in arithmetic progression? +5 How does the divisibility graphs work?

 32 How many ways are there for 8 men and 5 women to stand in a line so that no two women stand next to each other? 23 Free online mathematical software 20 Online tool for making graphs (vertices and edges)? 14 Number of permutations of $n$ where no number $i$ is in position $i$ 10 How to convert $\sqrt{\frac{5}{3}}$ to $\frac{\sqrt{15}}{3}$?

### Tags (110)

 100 combinatorics × 107 23 experimental-mathematics 60 algebra-precalculus × 150 21 elementary-number-theory × 62 53 permutations × 7 20 graph-theory × 5 43 math-software × 4 20 online-resources × 2 23 big-list × 2 18 faq × 3

### Accounts (18)

 Mathematics 9,369 rep 342113 Programming Puzzles & Code Golf 1,220 rep 518 Stack Overflow 993 rep 21438 English Language & Usage 382 rep 4519 Area 51 151 rep 3