# PlanetPhysics/Commutative Triangle Diagram

A commutative triangle diagram , ${\displaystyle T_{CD}}$, which is represented geometrically as: $xy}"): {\displaystyle \begin{xy} *!C\xybox{ \xymatrix{ {A}\ar[rr]^{f}\ar[dr]_{h}&&{B}\ar[dl]^{g}\\ &{C}& } }\end{xy}$ is also defined algebraically by the equality ${\displaystyle h=g\circ f}$