60 Is it possible to represent every irrational number as a (limit of) an infinite sum of rational numbers? 31 Where is the absolute value when computing antiderivatives? 23 Factorial question: number of trailing zeroes in 125! 14 Can a polynomial be expressed as an infinite sum of non-polynomial functions? 13 Why does Wolfram Alpha say that $\infty^\infty$ results in “complex infinity”?

### Reputation (12,230)

 +10 Evaluating $\int_{\mathbb{R}}\left( \frac{\sin x}{x}\right )^3$ with Parseval's identity +10 Trigonometric quadratic formula? And other trig solutions for roots of polynomials? +15 Order of poles on a function +10 Extension Theorems

### Questions (36)

 26 Odd Number of Cats? 20 Sheaf Theory for Complex Analysis 11 Proof of identity for $\pi$: $\frac{\pi}{3} = \frac{2}{\sqrt{2+\sqrt{3}}}\frac{2}{\sqrt{2+\sqrt{2+\sqrt{3}}}}\cdots$ 7 “Ordering” of Complex Plane 6 Puiseux Expansion of Gamma Function about Infinity

### Tags (218)

 273 calculus × 140 66 limits × 42 121 integration × 69 63 irrational-numbers × 2 88 sequences-and-series × 63 58 real-analysis × 45 77 algebra-precalculus × 48 53 trigonometry × 37 67 complex-analysis × 42 53 derivatives × 35

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