# A map between arborifications of multiple zeta values

## TL;DR

This paper constructs a natural map between two Hopf algebras of decorated rooted trees, linking series and integral expressions of arborified multiple zeta values, ensuring diagram commutativity.

## Contribution

It introduces a recursive method to build a natural map between two BCK Hopf algebras of planar rooted trees, addressing a question posed by Manchon.

## Key findings

- Constructed a natural, recursive map between the two Hopf algebras.
- Ensured the diagram involving arborifications is commutative.
- Bridged the gap between series and integral expressions of arborified multiple zeta values.

## Abstract

Arborified multiple zeta values are a generalization of multiple zeta values associated with rooted trees. There are two types of decorated rooted trees, corresponding respectively to the series and the integral expressions. Manchon introduces the contracting arborification (resp. the simple arborification), which is maps from the BCK Hopf algebras of the decorated rooted trees corresponding to the series expression (resp. the integral expression) to the non-commutative polynomial algebras of the set $\mathbb{N}$ (resp. the set $\{0,1\}$). There is a natural map between the two non-commutative polynomial algebras. Manchon posed the question of finding a natural map between the two BCK Hopf algebras that would make the diagram commutative. In this paper, we consider planar rooted trees and use a recursive method to construct such a map between the two BCK Hopf algebras, making the diagram commutative.