This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
MorphismOfDeltaFunctors. math en commutative diagram showing morphism of functors Own work using LaTex and dvi RobHar Data file The LaTeX code used to produce this diagram is the following begin CD cdots deltaS prime primeprime deltaS prime cdots Fn prime VV Fn VV Fn primeprime VV prime VV cdots deltaT prime primeprime deltaT