I am reading Feynman's QED.(adsbygoogle = window.adsbygoogle || []).push({});

On page 50 he states " The probability of an event is equal to the square of the length of an arrow called the "probility amplitude".

What, if any, is the relationship between Feynman's "arrow" and Shroedinger's wave function "psi".

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# QED Feynman

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