The Sheffer Group and the Riordan Group
We define the Sheffer group of all Sheffer-type polynomials and prove the isomorphism between the Sheffer group and the Riordan group. An equivalence of the Riordan array pair and generalized Stirling number pair is also presented. Finally, we discuss a higher dimensional extension of Riordan array pairs.
Tian-Xiao He. "The Sheffer Group and the Riordan Group" Discrete Applied Math 155 (2007): 1895-1909.
Available at: http://works.bepress.com/tian_xiao_he/1
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