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        riddles >> general problem-solving / chatting / whatever >> impossibility of equality along finite interval
        
(Message started by: jarls on Nov 7^th, 2009, 9:06pm)

Title: impossibility of equality along finite interval
Post by jarls on Nov 7^th, 2009, 9:06pm

Prove that no two distinct closed-form functions can be equal to one another along a non-zero finite interval.

Title: Re: impossibility of equality along finite interva
Post by Obob on Nov 7^th, 2009, 10:01pm

Here's the key ingredient:

http://en.wikipedia.org/wiki/Identity_theorem