Factoring Middle Binomial Coefficients

Hankel determinants of middle binomial coefficients and conjectures for some polynomial extensions and modifications

The middle binomial coefficients can be interpreted as numbers of Motzkin paths which have no horizontal steps at positive heights. Assigning suitable weights gives some nice polynomial extensions. We determine the Hankel determinants and their generating functions for the middle binomial coefficients and derive many conjectures for their polynomial extensions. Finally, we explore experimentally some modifications of the middle binomial coefficients whose Hankel determinants show an interesting modular pattern and obtain some q-analogs.

A binomial-coefficient identity arising from the middle discrete series of SU(2,2)

The aim of this paper is to give an elementary proof of certain identities on binomials and state an answer to Remark 8.2 in Takahiro Hayata, Harutaka Koseki, and Takayuki Oda, Matrix coefficients of the middle discrete series of SU(2,2), J. Funct. Anal. 185 (2001), 297-341.

素数基二项式同余的结构化解

Structured Solutions of Prime-Base Binomial Congruences

研究素数基 q 下二项式同余式 C(qn, n) ≡ q^n (mod n) 的解结构，将解 n = q^t p 转化为模 p 同余和数字和不等式两个独立条件，并用于生成新解及证明平方解与 Wieferich 素数等价。