Diffusion creep

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

$(1-a)(1-b)(1-c)(1-d)+a+b+c+d\ge 1.$

The inequality is named after the German mathematician Karl Weierstrass.

Template:Mathanalysis-stub