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   construction of closure operations in a category of presheaves  
   
نویسنده nodehi mehdi
منبع caspian journal of mathematical sciences - 2022 - دوره : 11 - شماره : 1 - صفحه:115 -125
چکیده    We construct some types of universal closure operations induced by certain collection of morphisms. for this purpose, we use lawvere-tierney topologies and universal closure operations that correspond to each other to establish the equivalent conditions over the collection of morphisms. in this way we use multiple sieves instead of principal sieves for constructing results. examples are also given to illustrate the established results.
کلیدواژه class of morphisms ,lawvere-tierney topology ,closure operation ,presheaf
آدرس university of bojnord, faculty of basic sciences, department of mathematics, iran
پست الکترونیکی m.nodehi@ub.ac.ir
 
     
   
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