Eric Naslund

 338 How can I evaluate $\sum_{n=0}^\infty(n+1)x^n$? 147 $\int_{-\infty}^{+\infty} e^{-x^2} dx$ with complex analysis 125 Direct Proof that $1 + 3 + 5 + \cdots+ (2n - 1) = n\cdot n$ 96 100 Soldiers riddle 86 What is special about the numbers 9801, 998001, 99980001 ..?

### Reputation (61,782)

 +10 Is there a geometric meaning of the Frobenius norm? +10 Value of cyclotomic polynomial evaluated at 1 +10 How many roots of a polynomial have positive real part? +10 What is the sum of the prime numbers up to a prime number $n$?

### Questions (31)

 261 The Mathematics of Tetris 63 Limits: How to evaluate $\lim\limits_{x\rightarrow \infty}\sqrt[n]{x^{n}+a_{n-1}x^{n-1}+\cdots+a_{0}}-x$ 36 Fermat's Last Theorem and Kummer's Objection 34 A series problem by Knuth 31 Explicitly reconstructing a function from its moments

### Tags (243)

 1k sequences-and-series × 107 595 elementary-number-theory × 62 1k number-theory × 160 587 integration × 62 888 analytic-number-theory × 145 460 convergence × 25 731 calculus × 102 450 complex-analysis × 51 623 prime-numbers × 77 381 faq × 7