sheaf
noun · verbA2Định nghĩa theo từ loại
Danh từ
noun- 1.
A quantity of the stalks and ears of wheat, rye, or other grain, bound together; a bundle of grain or straw.
Đồng nghĩa: reap, wheatsheaf
- 2.
Any collection of things bound together.
a sheaf of paper
Đồng nghĩa: bundle
- 3.
A bundle of arrows sufficient to fill a quiver, or the allowance of each archer.
- 4.
A quantity of arrows, usually twenty-four.
- 5.
(mechanical) A sheave.
- 6.
(mathematics) 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 ℱ whose sections are, in a technical sense, uniquely determined by their restrictions onto smaller sets: that is, given an open cover U_i of U:
Động từ
verb- 1.
(transitive)To gather and bind into a sheaf; to make into sheaves
to sheaf wheat
- 2.
(intransitive)To collect and bind cut grain, or the like; to make sheaves.
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Nguồn gốc từ
From Middle English scheef, from Old English sċēaf, from *skaub, from Proto-Germanic *skauba- (sheaf).