For math lovers around the world, March 14 is a holiday, "Pi Day." That's because the date — 3/14 — is also the beginning of the decimal expansion of the world's best-known irrational number: ...

A former student of mine wrote to ask about π. Specifically, he wondered how, whenever someone announces they've calculated the first 100 billion digits or whatever (actually, the current record is 13 ...

Happy birthday, Einstein! But this is also Pi Day, and a very special Pi Day at that. Why so special? The date is 3/14/15, the first five digits in the ratio of the circumference of a circle to its ...

Today is Pi Day, so named because the first three digits of pi are 3.14 and the date is March 14—or 3/14 in the format used in the United States. Yes, on most other parts of Earth today is also March ...

Math students everywhere will be eating pies in class this week in celebration of what is known as Pi Day, the 14th day of the 3rd month. The symbol π (pronounced paɪ in English) is the sixteenth ...

This whole series of posts was motivated by a question from a former student of mine: whenever someone announces they've computed a bunch of digits of π, how do we know it's correct? As I pointed out ...

You're currently following this author! Want to unfollow? Unsubscribe via the link in your email. Happy Pi Day! It's March 14, or in American notation, 3/14, matching the first three digits of π. One ...

Some people can't remember a nine-digit Social Security number without a prompt; Siva Natarajan can recite hundreds of consecutive digits for π, the irrational number that never ends and never repeats ...