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Generalized extending ideals in modular lattices. (English) Zbl 1351.06004

Authors’ abstract: The concept of an extending ideal and that of \(I\)-jectivity for an ideal in a lattice is introduced. It is shown that in a modular lattice, the direct sum of extending ideals is extending if and only if the ideals are relatively jective. We also define a generalized extending ideal in a lattice and obtain some properties and characterizations of such ideals in a modular lattice.

MSC:

06B10 Lattice ideals, congruence relations
06C05 Modular lattices, Desarguesian lattices