Ring theory

Stably finite ring

In mathematics, particularly in abstract algebra, a ring R is said to be stably finite (or weakly finite) if, for all square matrices A and B of the same size with entries in R, AB = 1 implies BA = 1. This is a stronger property for a ring than having the invariant basis number (IBN) property. Namely, any nontrivial stably finite ring has IBN. Commutative rings, noetherian rings and artinian rings are stably finite. Subrings of stably finite rings and matrix rings over stably finite rings are stably finite. A ring satisfying is stably finite. (Wikipedia).

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RNT1.2. Definition of Integral Domain

Ring Theory: We consider integral domains, which are commutative rings that contain no zero divisors. We show that this property is equivalent to a cancellation law for the ring. Finally we note some basic connections between integral domains and fields.

From playlist Abstract Algebra

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Definition of a Ring and Examples of Rings

Please Subscribe here, thank you!!! https://goo.gl/JQ8Nys Definition of a Ring and Examples of Rings - Definition of a Ring. - Definition of a commutative ring and a ring with identity. - Examples of Rings include: Z, Q, R, C under regular addition and multiplication The Ring of all n x

From playlist Abstract Algebra

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Ring Examples (Abstract Algebra)

Rings are one of the key structures in Abstract Algebra. In this video we give lots of examples of rings: infinite rings, finite rings, commutative rings, noncommutative rings and more! Be sure to subscribe so you don't miss new lessons from Socratica: http://bit.ly/1ixuu9W ♦♦♦♦♦♦♦♦♦

From playlist Abstract Algebra

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RNT1.1. Definition of Ring

Ring Theory: We define rings and give many examples. Items under consideration include commutativity and multiplicative inverses. Example include modular integers, square matrices, polynomial rings, quaternions, and adjoins of algebraic and transcendental numbers.

From playlist Abstract Algebra

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Chow ring 1. Introduction.

This lecture gives an introductory overview of the Chow ring of a nonsingular variety. The idea is to define a ring structure related to subvarieties with the product corresponding to intersection. There are several complications that have to be solved, in particular how to define intersec

From playlist Algebraic geometry: extra topics

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Commutative algebra 39 (Stably free modules)

This lecture is part of an online course on commutative algebra, following the book "Commutative algebra with a view toward algebraic geometry" by David Eisenbud. We discuss the relation between stably free and free modules. We first give an example of a stably free module that is not fre

From playlist Commutative algebra

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Commutative algebra 41 Locally free modules

This lecture is part of an online course on commutative algebra, following the book "Commutative algebra with a view toward algebraic geometry" by David Eisenbud. We define locally free modules and explain that they are analogs of vector bundles in geometry. We give some examples of local

From playlist Commutative algebra

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What is a Chow Ring?

This is a lazy introduction to the idea of a Chow Ring. I don't prove anything :-(. Maybe soon in another video.

From playlist Intersection Theory

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Every Boolean Ring is Commutative Proof

Please Subscribe here, thank you!!! https://goo.gl/JQ8Nys Every Boolean Ring is Commutative Proof

From playlist Abstract Algebra

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Commutative algebra 38 Survey of module properties

This lecture is part of an online course on commutative algebra, following the book "Commutative algebra with a view toward algebraic geometry" by David Eisenbud. We give a short survey of some of the properties of modules, in particular free, stably free, Zariski locally free, projectiv

From playlist Commutative algebra

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Commutative algebra 44 Flat modules

This lecture is part of an online course on commutative algebra, following the book "Commutative algebra with a view toward algebraic geometry" by David Eisenbud. We summarize some of the properties of flat modules. In particular we show that for finitely presented modules over local ring

From playlist Commutative algebra

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Ring Definition (expanded) - Abstract Algebra

A ring is a commutative group under addition that has a second operation: multiplication. These generalize a wide variety of mathematical objects like the integers, polynomials, matrices, modular arithmetic, and more. In this video we will take an in depth look at the definition of a rin

From playlist Abstract Algebra

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Commutative algebra 42 Projective modules

This lecture is part of an online course on commutative algebra, following the book "Commutative algebra with a view toward algebraic geometry" by David Eisenbud. We discuss the relation between locally free things (vector bundles) and projective things. In commutative algebra and differe

From playlist Commutative algebra

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Alena Pirutka: On examples of varieties that are not stably rational

Find this video and other talks given by worldwide mathematicians on CIRM's Audiovisual Mathematics Library: http://library.cirm-math.fr. And discover all its functionalities: - Chapter markers and keywords to watch the parts of your choice in the video - Videos enriched with abstracts, b

From playlist Algebraic and Complex Geometry

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Floer Theory and Framed Cobordisms Between Exact Lagrangian Submanifolds - Noah Porcelli

Joint IAS/Princeton/Montreal/Paris/Tel-Aviv Symplectic Geometry Zoominar Topic: Floer Theory and Framed Cobordisms Between Exact Lagrangian Submanifolds Speaker: Noah Porcelli Affiliation: Imperial College London Date: February 24, 2023 Lagrangian Floer theory is a useful tool for study

From playlist Mathematics

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Andy Magid, University of Oklahoma (hybrid talk)

October 21, Andy Magid, University of Oklahoma Differential Projective Modules

From playlist Fall 2022 Online Kolchin seminar in Differential Algebra

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Energy spectra and fluxes of buoyancy-driven flows by Abhishek Kumar

Summer school and Discussion Meeting on Buoyancy-driven flows DATE: 12 June 2017 to 20 June 2017 VENUE: Ramanujan Lecture Hall, ICTS, Bengaluru Buoyancy plays a major role in the dynamics of atmosphere and interiors of planets and stars, as well as in engineering applications. This field

From playlist Summer school and Discussion Meeting on Buoyancy-driven flows

Related pages

Invariant basis number | Artinian ring | Abstract algebra | Mathematics | Subring | Noetherian ring | Ring (mathematics) | Matrix ring | Commutative ring