coherent sheaf
Let be a ring with unity, and be its prime spectrum. Given an -module , one can define a presheaf on by defining its sections on an open set to be . We call the sheafification of this , and a sheaf of this form on is called quasi-coherent. If is a finitely generated module, then is called coherent. A sheaf on an arbitrary scheme is called (quasi-)coherent if it is (quasi-)coherent on each open affine subset of .
Title | coherent sheaf |
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Canonical name | CoherentSheaf |
Date of creation | 2013-03-22 13:51:27 |
Last modified on | 2013-03-22 13:51:27 |
Owner | PrimeFan (13766) |
Last modified by | PrimeFan (13766) |
Numerical id | 11 |
Author | PrimeFan (13766) |
Entry type | Definition |
Classification | msc 14A15 |
Synonym | quasi-coherent sheaf |