\documentclass{article} 
\usepackage{amssymb}
 \usepackage{tikz-cd}
 \begin{document} 
 \[ \begin{tikzcd}[column sep=3em, row sep=1.5em] & A \otimes A \arrow{dd}{m} &\\ \mathbb{K}\otimes A \arrow{ur}{u \otimes \iota} \arrow{dr}{\sim} && A \otimes\mathbb{K} \arrow{ul}{\iota \otimes u} \arrow{dl}{\sim} \\ & A & \end{tikzcd} \] \end{document}