On the involutions of the Riordan group

Abstract

We give an algebraic description of involutions in the Riordan group.

Jordan Canonical Forms of Riordan Arrays

“…This case is connected with a finite order. Finite order of formal power series was studied in [2], whereas finite order of Riordan arrays was thorougly investigated in [1,3] (also earlier in [4] but only the case of order 2). From [3] (Thm.…”