John von Neumann and Stanislaw Ulam are flying first class to Vienna...

... when suddenly the plan pitches forward and starts hurtling downward. Looking around, they see nobody else who knows what to do, so they enter the cockpit and find the pilot and copilot slumped over unconscious. Ulam sits down at the controls and starts looking them over. "Do something, do something!" screams von Neumann. "We're about to die!"

"Calm down and give me a minute," says Ulam. "I'm just a simple Pole in a complex plane!"

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