By Doron Zeilberger
(Exclusively published in the Personal Journal of Shalosh B. Ekhad and Doron Zeilberger)
Written: Feb. 28, 2012 .
This short note generalizes a neat theorem and proof of Drew Sills, described in his beautiful and insightful article, where the "main" result is much less interesting than the histortical and mathematical exposition of the motivation and background. The expository tail is wagging the technical dog!
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