proving the zeta functional equation using contour integration.

This is a page on solving the Gaussian Integral with multivariable calculus. This has been done before and this is one of many Gaussian related pages. The Gaussian Integral Redo

This is another Page on the Gaussian Integral. This time, with a 2nd degree polyomial in the exponent.

This page shows how to prove Euler's reflection formula, but this time, without branch cuts.

An interesting way to solve integrals

Another way to evaluate the integral featured in "The Funky Logarithm"

Old MacDonald had a farm, and on that farm was a rebellious integral

Expanation and exampes of Feynmans integration technique.

This page shows how Euler's reflection formula for the gamma function was derived.

The integral from 0 to infinity of x/(x^n+1)dx. This integral is solved using the method of contour integration. This integral is a real complex conundrum!