Originally defined as the ratio between the circumference of a circle and its diameter, pi — written as the Greek letter π — ...

The ancient scholar Hippasus of Metapontum was punished with death for his discovery of irrational numbers—or at least that’s the legend. What actually happened in the fifth century B.C.E. is far from ...

On March 14 mathematicians everywhere enjoy a slice of pie as they recite the digits of math's most famous constant. Pi, defined as the ratio between the circumference of a circle and its diameter, is ...