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Mathematics Goes to the Movies

by Burkard Polster and Marty Ross

**The Day the Earth Stood Still (1951)**

34:50

Good blackboard in Prof. Barnardt’s office. Klatu leaves mathematical
visiting card.

39:15

same blackboard with more math added to it.

BARNARD: You wrote this?

KLATU: It was a clumsy way to introduce myself. But I understand you are a difficult
man to see. I thought you’d have the solution by this time.

BARNARD: Not yet. That’s why I wanted to see you.

KLATU: All you have to do now is to substitute this expression at this point.

BARNARD: Yes, that will reproduce the first-order term. But what about the effect
on the other terms?

KLATU: Almost negligible. With variation of parameters, this is the answer.

BARNARD: How can you be so sure? Have you tested this theory?

KLATU: I find it works well enough to get me from one planet to another.

46:21

Klatu, helps Bobby with his maths homework

KLATU: All you have to remember is first find the common denominator, and then
divide

BOBBY to his mother:

BOBBY: He’s my best friend, and he is awfully good in arithmetic. He even
helps Prof. Barnardt with his arithmetic.

Mom: Did you really go to see Prof. Barnhardt?

BOBBY: Sure we did. He wasn’t there, but we went to see him and Mr Carpenter
(Klatu poses as Mr Carpenter) showed him how to do his arithmetic.