Mathematics – Classical Analysis and ODEs
Scientific paper
2009-01-12
Mathematics
Classical Analysis and ODEs
24 pages; with correction of typos and minor revision. To appear in The Ramanujan Journal
Scientific paper
This study presents miscellaneous properties of pseudo-factorials, which are numbers whose recurrence relation is a twisted form of that of usual factorials. These numbers are associated with special elliptic functions, most notably, a Dixonian and a Weierstrass function, which parametrize the Fermat cubic curve and are relative to a hexagonal lattice. A continued fraction expansion of the ordinary generating function of pseudo-factorials, first discovered empirically, is established here. This article also provides a characterization of the associated orthogonal polynomials, which appear to form a new family of "elliptic polynomials", as well as various other properties of pseudo-factorials, including a hexagonal lattice sum expression and elementary congruences.
Bacher Roland
Flajolet Philippe
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