Hopf-Algebra/Kooperation/Neutrales Element/Diagramm

${\begin{matrix}R&{\stackrel {N}{\longrightarrow }}&H\otimes _{K}R&\\&\!\!\!\!\!\cong \searrow &\downarrow \epsilon \otimes \operatorname {Id} _{R}\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!&\\&&K\otimes _{K}R&\!\!\!\!\!\!\!\!\\\end{matrix}}$