Celebratio Mathematica

R. As­key: “Pos­it­ive Jac­obi poly­no­mi­al sums,” To­hoku Math. J. (2) 24 : 2 (1972), pp. 109–​119. Ded­ic­ated to Pro­fess­or Gen-ichirô Sun­ou­chi on his 60th birth­day. Part II was pub­lished in Am. J. Math 98:3 (1976). Part III was pub­lished in Lin­ear op­er­at­ors and ap­prox­im­a­tion, II (1974). MR 340672 Zbl 0237.​33010 article