Weierstrass product inequality

In mathematics, the Weierstrass product inequality states that given real numbers 0 ≤ a, b, c, d ≤ 1, it follows that

(1-a)(1-b)(1-c)(1-d)+a+b+c+d \geq 1. \,

The inequality is named after the German mathematician Karl Weierstrass.

This article is issued from Wikipedia - version of the 2/4/2011. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.