added to crossed complex a section Morphisms.
Also single out in the Idea section, among the list of 50 or so different ways to look at a crosssed module, the nPOV-perspective to the top and highlighted it.
Because: Nothing in biology makes sense without the theory of evolution, they say. Nothing in math makes sense without the nPOV. (I'll add this statement now to nPOV :-))
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also butterfly diagrams at crossed profunctor
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