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2
Understanding Penrose diagrammatical notation
3
conditions for natural transformations to exist?
8
Is there a standard notation for binary relations in category theory?
0
creating high quality figures of surfaces
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When are all split monomorphisms complemented?
6
Resources for graphical languages / Penrose notation / Feynman diagrams / birdtracks?
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What are examples of good toy models in mathematics?
11
“Philosophical” meaning of the Yoneda Lemma
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When do PROP-morphisms induce adjunctions?
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Can the objects of every concrete category themselves be realized as small categories?
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Category theory sans (much) motivation?
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What’s a groupoid? What’s a good example of a groupoid?