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Quote by Saunders MacLane

“If P is a presheaf on C and x E P(C), the value for an arrow f : D -* C in C is called the restriction of x along f, and is often denoted by I or by a dot:” quote by Saunders MacLane
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““If P is a presheaf on C and x E P(C), the value for an arrow f : D -* C in C is called the restriction of x along f, and is often denoted by I or by a dot:””

Saunders MacLane

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