Dissertations, Theses, and Capstone Projects
Date of Degree
6-2014
Document Type
Dissertation
Degree Name
Ph.D.
Program
Mathematics
Advisor
Lucien Szpiro
Subject Categories
Mathematics
Keywords
Pure sciences, African, Asymptotic, Endomorphism, Length, Local, Ring
Abstract
For a local endomorphism of a noetherian local ring we introduce 3 asymptotic invariants one of which we call entropy. We use this notion of entropy to extend numerical conditions in Kunz' regularity criterion to every contracting endomorphism of a noetherian local ring, and to give a characteristic-free interpretation of the definition of Hilbert-Kunz multiplicity. We also show that every finite endomorphism of a complete noetherian local ring of equal characteristic can be lifted to a finite endomorphism of a complete regular local ring. The local ring of an algebraic or analytic variety at a point fixed by a finite self-morphism inherits a local endomorphism whose entropy is well-defined. This situation arises at the vertex of the affine cone over a projective variety with a polarized self-morphism, where we compare entropy with degree.
Recommended Citation
Miasnikov, Nikita, "Asymptotic Invariants and Flatness of Local Endomorphisms" (2014). CUNY Academic Works.
https://academicworks.cuny.edu/gc_etds/511