Sheaf
English
Etymology
From Template:Inh, from Template:Inh, from Template:Inh, from Template:Der.
Template:Col-top Akin to Template:Cog, Template:Cog, Template:Cog, Template:Cog. Compare further Template:Cog, Template:Cog. Template:Col-bottom
Pronunciation

Noun
- Template:SenseidA quantity of the stalks and ears of wheat, rye, or other grain, bound together; a bundle of grain or straw.
- Any collection of things bound together.
- A bundle of arrows sufficient to fill a quiver, or the allowance of each archer.
- A quantity of arrows, usually twenty-four.
- Template:Lb A sheave.
- Template:Lb An abstract construct in topology that associates data to the open sets of a topological space (i.e. a presheaf) in such a way so as to make the local and global data compatible, generalizing the situation of functions, fiber bundles, manifold structure, etc. on a topological space. Formally, a presheaf whose sections are, in a technical sense, uniquely determined by their restrictions onto smaller sets: that is, given an open cover of :
- If two sections over agree under restriction to every , then the sections are the same.
- Given a family of sections such that all pairs agree under restriction to , there is a (unique) section over whose restriction to is .
Derived terms
Translations
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Verb
- Template:Lb To gather and bind into a sheaf; to make into sheaves
- Template:Lb To collect and bind cut grain, or the like; to make sheaves.