Injective modules and torsion functors
classification
🧮 math.AC
keywords
ringsmodulesrespecta-torsionapplicationsbehaviourcertainclasses
read the original abstract
A commutative ring is said to have ITI with respect to an ideal a if the a-torsion functor preserves injectivity of modules. Classes of rings with ITI or without ITI with respect to certain sets of ideals are identified. Behaviour of ITI under formation of rings of fractions, tensor products and idealisation is studied. Applications to local cohomology over non-noetherian rings are given.
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