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    • CommentRowNumber1.
    • CommentAuthorMarek897
    • CommentTimeMar 19th 2022
    • (edited Mar 19th 2022)
    How prove that for two morphisms f, ψ : F → G of sheaves of sets on a topological space X if f = ψ if and only if f, ψ induces the same maps on stalks.
    Deduce that a morphism of sheaves of sets on X is an epimorphism if and only if it is onto on stalks.

    I don't know how I should prove it.
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