Abstract
We answer the question posed by L.W. Shapiro about a property of elements whose (pseudo) order in the Riordan group is equal to 2. We prove that if (g(z), f(z)) is such an element, then, with some restictions, f is uniquely determined by g.
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Słowik, R. Some New Facts About (Pseudo) Involutions in the Riordan Group. Indian J Pure Appl Math 51, 1769–1777 (2020). https://doi.org/10.1007/s13226-020-0496-3
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DOI: https://doi.org/10.1007/s13226-020-0496-3