Prefaceto the Paperback Edition
Finally I meet my imaginary part!
—Nobel Prize-winning (1989) experimental physicist Wolfgang Paul upon meeting the Nobel Prize-winning (1945) theoretical physicist Wolfgang Pauli (this joke makes sense once you remember the structure of a complex number and that
−1 = eiπ,
Proves that Euler was a sly guy.
But ζ (2)
Was totally new
And raised respect for him sky-high.
—William C. Waterhouse, professor of mathematics ...