Fabiomassimo Castelluzzo

The Minimal Denominator of Dual Koornwinder Coefficients

Let N^Z_lambda denote the dual coefficients in the Schur expansion of the rescaled multivariate Askey-Wilson polynomials at the Koornwinder specialization t = q. Cho, Kim, Kim, Lee, Liu and Song conjectured an explicit cell-product formula for the minimal denominator of N^Z_lambd...

An All-Multiplicity R12 Discrete-Value Theorem for Half-Collinear Single-Minus Yang-Mills Amplitudes

Summary. We prove an all-multiplicity discrete-value theorem in the adjacent-two-incoming R12 sector, using an alternating-sign collapse of the canonical ordered-partition recursion. We are not aware of a public statement of this result. We consider half-collinear single-minus Ya...