ジョージ・ギャスパー
Gasper, G., & Rahman, M. (1984). Product formulas of Watson, Bailey and Bateman types and positivity of the Poisson kernel for q {\displaystyle q} -Racah polynomials. SIAM Journal on Mathematical Analysis, 15(4), 768-789.
Gasper, G., & Rahman, M. (1986). Positivity of the Poisson kernel for the continuous q {\displaystyle q} -Jacobi polynomials and some quadratic transformation formulas for basic hypergeometric series.