Algebraic topology

Gysin homomorphism

In the field of mathematics known as algebraic topology, the Gysin sequence is a long exact sequence which relates the cohomology classes of the base space, the fiber and the total space of a sphere bundle. The Gysin sequence is a useful tool for calculating the cohomology rings given the Euler class of the sphere bundle and vice versa. It was introduced by Gysin, and is generalized by the Serre spectral sequence. (Wikipedia).

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Homomorphisms in abstract algebra

In this video we add some more definition to our toolbox before we go any further in our study into group theory and abstract algebra. The definition at hand is the homomorphism. A homomorphism is a function that maps the elements for one group to another whilst maintaining their structu

From playlist Abstract algebra

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Group Isomorphisms in Abstract Algebra

Please Subscribe here, thank you!!! https://goo.gl/JQ8Nys Group Isomorphisms in Abstract Algebra - Definition of a group isomorphism and isomorphic groups - Example of proving a function is an Isomorphism, showing the group of real numbers under addition is isomorphic to the group of posit

From playlist Abstract Algebra

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Simon Brain: The Gysin Sequence for Quantum Lens Spaces

This is a joint with Francesca Arici and Giovanni Landi. We construct an analogue of the Gysin sequence for circle bundles, now for q-deformed lens spaces in the sense of Vaksman-Soibelman. Our proof that the sequence is exact relies heavily on the non commutative APS index theory of Care

From playlist HIM Lectures: Trimester Program "Non-commutative Geometry and its Applications"

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Shinichiroh Matsuo : Gysin maps and bulk-edge correspondence

Abstract: We propose a yet another definition of KR-groups, which combines those of Atiyah and Karoubi and gives a simple proof of the Bott periodicity. Using the new definition, we can formulate the bulk-edge correspondence for free fermion systems as the functoriality of the Gysin map. T

From playlist Mathematical Physics

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Group theory 3: Homomorphisms

This is lecture 3 of an online mathematics course on group theory. It gives a review of homomorphisms and isomorphisms and gives some examples of these.

From playlist Group theory

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302.3A: Review of Homomorphisms

A visit to the homomorphism "zoo," including definitions of mono-, epi-, iso-, endo-, and automorphisms.

From playlist Modern Algebra - Chapter 17 (group homomorphisms)

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Homomorphisms in abstract algebra examples

Yesterday we took a look at the definition of a homomorphism. In today's lecture I want to show you a couple of example of homomorphisms. One example gives us a group, but I take the time to prove that it is a group just to remind ourselves of the properties of a group. In this video th

From playlist Abstract algebra

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Isomorphisms in abstract algebra

In this video I take a look at an example of a homomorphism that is both onto and one-to-one, i.e both surjective and injection, which makes it a bijection. Such a homomorphism is termed an isomorphism. Through the example, I review the construction of Cayley's tables for integers mod 4

From playlist Abstract algebra

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Group Homomorphisms - Abstract Algebra

A group homomorphism is a function between two groups that identifies similarities between them. This essential tool in abstract algebra lets you find two groups which are identical (but may not appear to be), only similar, or completely different from one another. Homomorphisms will be

From playlist Abstract Algebra

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What is a Group Homomorphism? Definition and Example (Abstract Algebra)

Please Subscribe here, thank you!!! https://goo.gl/JQ8Nys What is a Group Homomorphism? Definition and Example (Abstract Algebra)

From playlist Abstract Algebra

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Francesca Arici: Sphere bundles in noncommutative geometry

The lecture was held within the framework of the Hausdorff Trimester Program: K-Theory and Related Fields. Cuntz-Pimsner algebras are universal C*-algebras associated to a C*-correspondence and they encode dynamical information. In the case of a self Morita equivalence bimodule they can b

From playlist HIM Lectures: Trimester Program "K-Theory and Related Fields"

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Visual Group Theory, Lecture 4.1: Homomorphisms and isomorphisms

Visual Group Theory, Lecture 4.1: Homomorphisms and isomorphisms A homomoprhism is function f between groups with the key property that f(ab)=f(a)f(b) holds for all elements, and an isomorphism is a bijective homomorphism. In this lecture, we use examples, Cayley diagrams, and multiplicat

From playlist Visual Group Theory

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Fedor SMIRNOV - Diagonal Finite Volume Matrix Elements in the Sinh-Gordon Model

Sinh-Gordon model is the simplest integrable model of QFT which is interesting, in particular, due to its relation to the Liouville model. In this talk I shall present hypothetical formulae for the diagonal matrix elements. The stress will be put on the UV limit and its relation to the Lio

From playlist Integrability, Anomalies and Quantum Field Theory

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Schemes 10: Morphisms of affine schemes

This lecture is part of an online algebraic geometry course on schemes, based on chapter II of "Algebraic geometry" by Hartshorne. We try to define morphisms of schemes. The obvious definition as morphisms of ringed spaces fails as we show in an example. Instead we have to use the more su

From playlist Algebraic geometry II: Schemes

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Stability and sofic approximations for product groups and property (tau) - Adrian Ioana

Stability and Testability Topic: Stability and sofic approximations for product groups and property (tau) Speaker: Adrian Ioana Affiliation: University of California, San Diego Date: November 4, 2020 For more video please visit http://video.ias.edu

From playlist Stability and Testability

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Group Homomorphisms and the big Homomorphism Theorem

This project was created with Explain Everything™ Interactive Whiteboard for iPad.

From playlist Modern Algebra

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Visual Group Theory, Lecture 4.3: The fundamental homomorphism theorem

Visual Group Theory, Lecture 4.3: The fundamental homomorphism theorem The fundamental homomorphism theorem (FHT), also called the "first isomorphism theorem", says that the quotient of a domain by the kernel of a homomorphism is isomorphic to the image. We motivate this with Cayley diagr

From playlist Visual Group Theory

Related pages

Wedge product | Cohomology ring | Shriek map | Differential form | Fiber bundle | Integration along fibers | Algebraic topology | Cohomology | Euler class | Pullback | De Rham cohomology | Normal cone | Cup product | Intersection theory | Mathematics | Fundamental class | Serre spectral sequence | Regular embedding | Logarithmic form