Instead, this letter has its origin in an ancient Greek symbol called a 'Christogram'. According to the expert, the nickname emerged from a long-forgotten joke about Jesus' initials. Dr McClellan ...

The crossed-out circle symbol is akin to the Greek letter "Phi". It indicates the spot where the light-sensitive matrix or plane of traditional light-sensitive material resides. This is the exact ...

Math fanatics from all around the world and everyone else who just loves ancient Greek pi (or pie) celebrate on March 14.