Weierstrass product inequality

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.


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