The eternal question that keeps mathematicians up at night: if Σ represents summation and Π represents multiplication, what unholy symbol lurks in the darkness for exponentiation?
Mathematicians have standardized notation for adding things up and multiplying sequences, but apparently drew the line at creating a dedicated symbol for "let's raise this to the power of that a bunch of times."
Some grad student is probably frantically working on this right now, hoping to name it after themselves. "And here we apply the Johnson Exponentiation Operator..." Sure, buddy. Keep dreaming.