Yuval Filmus
Reputation
37,491
91/100 score
2 45 97
Impact
~750k people reached

 127 How to study math to really understand it and have a healthy lifestyle with free time? 59 Why, although these functions have the same derivative, do they not differ by a constant? 35 $x^y = y^x$ for integers $x$ and $y$ 31 Prime number between $n$ and $n!+1$ 31 Proof that $\sum\limits_{k=1}^nk^2 = \frac{n(n+1)(2n+1)}{6}$?

### Reputation (37,491)

 +10 Number Theory cubic residues +10 What is the story behind ${n+1 \choose k} = {n \choose k} + {n \choose k-1}$? +10 How do the Catalan numbers turn up here? +5 Identification of a curious function

### Questions (10)

 99 Identification of a curious function 37 Good examples of double induction 23 Theorems true “with probability 1”? 13 Number of connected graphs on labeled vertices, counted according to parity 13 A recurrence that wiggles?

### Tags (281)

 440 combinatorics × 139 182 calculus × 44 345 probability × 131 171 elementary-number-theory × 40 235 sequences-and-series × 66 168 real-analysis × 63 205 linear-algebra × 63 155 algebra-precalculus × 49 203 number-theory × 76 140 computer-science × 60

### Accounts (18)

 Computer Science 67,555 rep 451133 Mathematics 37,491 rep 24597 Theoretical Computer Science 10,519 rep 12360 MathOverflow 917 rep 917 TeX - LaTeX 500 rep 148