- #1
Ted123
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Why is the Gauss summation formula for complex parameters a,b,c: [tex]\displaystyle _2 F_1 (a,b;c;1) = \frac{\Gamma (c) \Gamma (c-a-b)}{\Gamma (c-a) \Gamma (c-b)}[/tex] only valid for [itex]\text{Re}(c-a-b)>0,\;c\neq 0,-1,-2,-3,...[/itex]?