The Étale Spectrum of Non-commutative Rings

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Hauptverfasser: Revista, Zen, MATH, 10
Format: Recurso digital
Veröffentlicht: Zenodo 2025
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author Revista, Zen
MATH, 10
author_facet Revista, Zen
MATH, 10
contents This paper explores the theoretical construction and properties of the étale spectrum in the context of non-commutative rings. While the classical Zariski spectrum provides a foundational geometric insight for commutative algebra, its direct generalization to non-commutative settings is often inadequate due to the absence of prime ideals behaving as points. The étale topology, a powerful tool in commutative algebraic geometry for studying local properties and covering spaces, offers a promising avenue. We develop a framework for defining a suitable étale site for certain classes of non-commutative rings, leveraging categorical methods and the theory of non-commutative localization. The methodology involves identifying appropriate categories of non-commutative modules or representations that can serve as the underlying "objects" of the site, and then defining coverings based on faithful flatness or related concepts suitable for non-commutative structures. We investigate the resulting spectral space, its functorial properties, and its relationship to existing non-commutative spectra such as the primitive spectrum or the prime spectrum of specific non-commutative algebras. Through concrete examples, including Weyl algebras and enveloping algebras of Lie algebras, we demonstrate the applicability of this construction and highlight how the non-commutative étale spectrum can provide a richer geometric understanding of these algebras, revealing aspects not captured by other spectral theories. The discussion focuses on the implications for non-commutative algebraic geometry, representation theory, and potential connections to quantum group theory and mathematical physics.
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spellingShingle The Étale Spectrum of Non-commutative Rings
Revista, Zen
MATH, 10
This paper explores the theoretical construction and properties of the étale spectrum in the context of non-commutative rings. While the classical Zariski spectrum provides a foundational geometric insight for commutative algebra, its direct generalization to non-commutative settings is often inadequate due to the absence of prime ideals behaving as points. The étale topology, a powerful tool in commutative algebraic geometry for studying local properties and covering spaces, offers a promising avenue. We develop a framework for defining a suitable étale site for certain classes of non-commutative rings, leveraging categorical methods and the theory of non-commutative localization. The methodology involves identifying appropriate categories of non-commutative modules or representations that can serve as the underlying "objects" of the site, and then defining coverings based on faithful flatness or related concepts suitable for non-commutative structures. We investigate the resulting spectral space, its functorial properties, and its relationship to existing non-commutative spectra such as the primitive spectrum or the prime spectrum of specific non-commutative algebras. Through concrete examples, including Weyl algebras and enveloping algebras of Lie algebras, we demonstrate the applicability of this construction and highlight how the non-commutative étale spectrum can provide a richer geometric understanding of these algebras, revealing aspects not captured by other spectral theories. The discussion focuses on the implications for non-commutative algebraic geometry, representation theory, and potential connections to quantum group theory and mathematical physics.
title The Étale Spectrum of Non-commutative Rings
url https://doi.org/10.5281/zenodo.17805966