Glaz's existence problem for a non-Noetherian Cohen–Macaulay notion
Glaz's existence problem for a non-Noetherian Cohen–Macaulay notion
The paper works with commutative rings and modules, and uses for the subring of elements of a ring fixed by a group of automorphisms. A ring is coherent when its finitely generated ideals are finitely presented, and a coherent ring is regular when it has the corresponding regularity property.
Glaz's existence problem. Can one define non-Noetherian Cohen–Macaulay rings so that: (i) the definition agrees with the usual definition for Noetherian rings; (ii) coherent regular rings are Cohen–Macaulay; and (iii), whenever is a coherent regular ring, is a group of automorphisms of , there is an -module retraction
and is finitely generated as an -module, the invariant ring is Cohen–Macaulay?
This is Glaz's problem for extending Cohen–Macaulayness beyond the Noetherian setting while retaining the classical case, including coherent regular rings and a Hochster–Eagon-type invariant-ring theorem. The supplied text does not state whether the problem has been resolved.
Sources & referencesView supporting material
Primary source
Mohsen Asgharzadeh and Massoud Tousi, “On the notion of Cohen-Macaulayness for non Noetherian rings”, arXiv:0809.1228 (2008).
Progress summary
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