Asia Mathematika

An International Journal. ISSN: 2457-0834 (online)

Volume 2, Issue 3, December 2018, Pages: 8-13

Quasi-coherent modules over disjoint union of affine schemes

Mohamed Aqalmoun

Department of Mathematics, Faculty of Science, University Moulay Ismail, B.P. 11201, Zitoune, Mekn`es 50000, Morocco.


In this paper, we study the category of quasi-coherent modules over disjoint union of affine schemes. We show that is has enough projectives and we give example of non affine scheme with trivial quasi-coherent cohomology.


Projective object, quasi-coherent module, cohomology, scheme, affine scheme.



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