1. Feb 19, 2007 #1

   touqra

   

   What is analytic continuation? Seems to be used often in QFT.

    

   touqra, Feb 19, 2007
2. 
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3. Feb 19, 2007 #2

   HallsofIvy

   

   Science Advisor

   Actually, it more mathematics than physics- If a function is analytic on an open subset of the complex numbers, then there is a unique way to define it outside that set in such a way that it is analytic for all complex numbers.

    

   HallsofIvy, Feb 19, 2007

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