This equality holds for *all* real numbers N,M 
Can you see why?pic.twitter.com/LvR2r0y6iT
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Time ago in an interview for a job I was asked the area of the Gaussian and I was so nervous that I resorted to this trick instead of recalling it from memory.
All of these curves must admit the EXACT same area!
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Job was for bank mathmo at Solomons in London so it was good show imho. Unfortunately my English was not at the required level. Quants.
Thanks. Twitter will use this to make your timeline better. UndoUndo
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