Pro-unipotent harmonic actions and a computation of $p$-adic cyclotomic multiple zeta values

Abstract: This paper gives foundations of a theory of $p$-adic cyclotomic multiple zeta values by explicit formulas, and a new notion called pro-unipotent harmonic actions. We prove formulas which express $p$-adic cyclotomic multiple zeta values in terms of certain cyclotomic multiple harmonic sums and vice-versa ; these formulas keep track of the motivic Galois action via the pro-unipotent harmonic actions. The proof uses the main result of \cite{I-1}. One of the formulas proves a conjecture of Akagi, Hirose and Yasuda which sheds light on the finite multiple zeta values of Kaneko and Zagier.