Finite Multiple Mixed Values (2402.08160v1)

Abstract: In recent years, a variety of variants of multiple zeta values (MZVs) have been defined and studied. One way to produce these variants is to restrict the indices in the definition of MZVs to some fixed parity pattern, which include Hoffman's multiple $t$-values, Kaneko and Tsumura's multiple $T$-values, and Xu and the author's multiple $S$-values. We have also considered the so-called multiple mixed values by allowing all possible parity patterns and studied a few important relations among these values. In this paper, we will turn to their finite analogs and their symmetric forms, motivated by a deep conjecture of Kaneko and Zagier which relates the finite MZVs and symmetric MZVs, and a generalized version of this conjecture by the author to the Euler sum (i.e., level two) setting. We will present a few important relations among these values such as the stuffle, reversal, and linear shuffle relations. We will also compute explicitly the (conjecturally smallest) generating set in weight one and two cases. In the appendix we tabulate some dimension computation for various sub-spaces of the finite multiple mixed values and propose a conjecture.