Describe examples of pre-sheaves \( \mathcal{F} \) for which the sheafification \( \mathcal{F} \longrightarrow \mathcal{F}^{+} \) is not
(i) injective
(ii) surjective
Also, find an example such that \( \mathcal{F} \neq 0 \), but \( \mathcal{F}^{+} = 0 \).
Examples Of Pre-Sheaves
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Tsakanikas Nickos
- Community Team
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