## A Different Pi for Pi Day

Tired of the circle constant? The prime counting function π(x) is an alternative way to celebrate everyone's favorite Greek letter that sounds like a dessert.

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Tired of the circle constant? The prime counting function π(x) is an alternative way to celebrate everyone's favorite Greek letter that sounds like a dessert.

March 14, 2014 — Evelyn Lamb

The digits of pi reciting contest is an all-too-common Pi Day event. And as this year is a once-in-a-century confluence of month/day/year with the first few decimal digits of pi, we might be in for more of those than usual.

March 11, 2015 — Evelyn Lamb

A physicist or engineer who uses (pi) in numerical calculations may need to have access to 5 or 15 decimal place approximations to this special number, but most of us—mathematicians included—don't need to know more (decimal-wise) than the fact that it's roughly 3.14.

March 14, 2015 — Colm Mulcahy

The more I learn about continued fractions, the more enamored I am with them. Last week, when I wrote about how much better continued fractions are than the arbitrary decimal digits we usually use to describe numbers, I mentioned that continued fractions tell us the "best approximations" of irrational numbers.

March 17, 2015 — Evelyn Lamb