We ask users to provide proof(s), reference(s) to proof(s), or further clarification on the proof(s) in this space.
: -Pochhammer symbol : http://dlmf.nist.gov/5.18#i http://dlmf.nist.gov/17.2#SS1.p1
: binomial coefficient : http://dlmf.nist.gov/1.2#E1 http://dlmf.nist.gov/26.3#SS1.p1
Equation in Section 14.7 of KLS.
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