#
nLab

dendrex

# Contents

## Idea

The notion of *dendrex* is the operadic analog of the notion of simplex.

## Definition

For $X$ a dendroidal set and $T$ a tree, a **$T$-shaped dendrex** of $X$ is a morphism

$\Omega[T] \to X
\,,$

hence equivalently, by the Yoneda lemma, an element of the set $X(T)$.

Created on March 14, 2012 at 10:28:57.
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