Kevin

 21 How is Category Theory used to study differential equations? 14 Evaluate $\int_{-\infty}^{\infty}\frac{\sin x}{x}\mathop{}\! \mathrm dx$ 12 What does it mean to multiply differentials? 11 Is there math with non-commutative multiplication of real numbers? 10 What are some examples of when Mathematics 'accidentally' discovered something about the world?

### Reputation (7,410)

 +10 Evaluate $\int_{-\infty}^{\infty}\frac{\sin x}{x}\mathop{}\! \mathrm dx$ +10 Scalar multiplication in vector space +10 Split up a double integral +10 Complex power property

### Questions (7)

 4 Modular Elliptic Curves and Eta Products 4 Indetermination in limit of integral $\lim_{x \rightarrow 0}(\int_0^{\sin x}e^{xt^{2}}dt \big/ \int _0^{\tan x}e^{-xt^{2}}dt)$ 3 Travelling wave solutions of the Tzitzeicaâ€“Doddâ€“Bullough equation 2 Convergence of $\iiint \frac{dxdydz}{(x^{2}+y^{2}+z^{2})^\alpha}$ 1 Maclaurin Series for $\operatorname{erf}(z)$

### Tags (261)

 105 calculus × 57 32 ordinary-differential-equations × 15 55 algebra-precalculus × 33 32 real-analysis × 13 55 integration × 32 24 elementary-number-theory × 15 43 differential-geometry × 33 24 soft-question × 7 33 number-theory × 15 24 reference-request × 4

### Bookmarks (609)

 1007 How long will it take Marie to saw another board into 3 pieces? 328 Calculating the length of the paper on a toilet paper roll 254 Limit of sequence of growing matrices 237 Evaluating the integral $\int_0^\infty \frac{\sin x} x \,\mathrm dx = \frac \pi 2$? 233 What are some examples of when Mathematics 'accidentally' discovered something about the world?