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On minimal modules. (English) Zbl 0808.16050

An example is given, showing that not every free finitely generated differential graded \(\Lambda\)-module is chain equivalent to a free finitely generated minimal differential graded \(\Lambda\)-module. Then it is shown that the above implication is true under the extra condition that the kernel of the augmentation map is nilpotent.

MSC:

16W50 Graded rings and modules (associative rings and algebras)
13N05 Modules of differentials
16S10 Associative rings determined by universal properties (free algebras, coproducts, adjunction of inverses, etc.)
16W25 Derivations, actions of Lie algebras