What is analytic continuation? Seems to be used often in QFT.
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Feb 19, 2007 #2 HallsofIvy Science Advisor Homework Helper 41,808 933 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.
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.