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I made this javascript prime factors calculator and have found it addictive. I just keep factorizing numbers. Enter the number to factoriz...

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The main struggle with integers comes, not with the numbers themselves, but with some of the operations. There seem to be so many little r...

Let $a,b,c$ be nonnegative real numbers such that $a^2+b^2+c^2=1.$ Prove that $$\frac{1}{1-a^2}+\frac{1}{1-b^2}+\frac{1}{1-c^2}+\frac{1}{1...

Readings for Wednesday August 25, 2010 First Reading: 2 Thessalonians 3:6-10, 16-18 Responsorial Psalm: Psalm 128 Gospel: Matthew 23:27...

With all this talk about solar plasma aurora storms, sunspots, I thought this would be an excellent opportunity to show off the Open Sourc...