A **hereditary ring** is a type of ring in the field of abstract algebra, particularly in ring theory. A ring \( R \) is called hereditary if every finitely generated module over \( R \) is a projective module. This is equivalent to saying that all submodules of finitely generated projective modules are also projective. In simpler terms, projective modules are those that resemble free modules in terms of their structure and properties.
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