We ask users to provide proof(s), reference(s) to proof(s), or further clarification on the proof(s) in this space.
-Racah polynomial : http://dlmf.nist.gov/18.28#E19
: cosine function : http://dlmf.nist.gov/4.14#E2
: Askey-Wilson polynomial : http://dlmf.nist.gov/18.28#E1
: -Pochhammer symbol : http://dlmf.nist.gov/5.18#i http://dlmf.nist.gov/17.2#SS1.p1
We ask users to provide relevant URL links in this space.