Algebra Seminar

The Department of Mathematics at Western Michigan University will present an algebra seminar on Mondays this fall semester.

Day and time: Mondays at 4 p.m.

Place: 6625 Everett Tower

The purpose of the Algebra Seminar this semester is to present an outline of the theory of complex semi-simple Lie algebras. The main goal is to reach the point where a novice can understand some structure theory of classical Lie groups and Lie algebras using Dynkin diagrams. A secondary goal is to understand the representation theory of complex semisimple Lie algebras. (These two goals are closely related.) Since this theory motivates or underlies many areas of contemporary research, students who plan to pursue a career in algebra or geometry are strongly urged to attend the Seminar.

The prerequisites for the Seminar are undergraduate abstract algebra and undergraduate linear algebra.

Other resources will be posted and/or shared separately, so please be sure to let Dr. Clifton E. Ealy Jr. know if you are interested in the seminar but were not able to attend the organizational meeting in September.

upcoming events

Oct. 23

Fusion in groups I presented by Clifton E. Ealy, Jr., Ph.D., Department of Mathematics, Western Michigan University

Abstract: The main topic of the Algebra Seminar at Western Michigan University this academic year is Fusion Systems. Fusion Systems has its antecedents in the work of Burnside; more recently in the works of Jonathan Alperin, George Glauberman, Don Higman, Ron Solomon and John G. Thompson. However, Fusion Systems present form was driven by the successful effort to prove the conjecture of John R. Martino and Stewart Priddy. In this series of talks I will give an overview of the rise of fusion and fusion systems in the study of finite groups.

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PAST EVENTS

Oct. 16

The beginnings of fusion; Burnside's normal p-complement theorem and Don Higman's focal subgroup theorem presented by Mohammad Shatnawi, Department of Mathematics, Western Michigan University

Abstract: In this talk we will apply the transfer map to prove Burnside's normal p-complement theorem. Also, after proving some technical transfer lemmas, a sketch of Don Higman's focal subgroup theorem will be given. The presentation is motivated by the treatment of Die Verlagerung in Marshall Hall Jr's text Group Theory.

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Oct. 9

Sharply 2-transitive groups of characteristic 2 presented by Clifton E. Ealy, Jr., Ph.D., Department of Mathematics, Western Michigan University

Abstract: In this talk we will discuss sharply 2-transitive groups of characteristic 2 or equivalently fields, near-fields and near-domains of characteristic 2. So, first we will discuss infinite fields, near-fields and near-domains of characteristic 2. Then we will move to a single binary operation and consider infinite sharply 2-transitive groups. Finally, we will consider generic proper near-domains of characteristic 2.

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Oct. 2

Die Verlagerung presented by Mohammad Shatnawi, Department of Mathematics, Western Michigan University

Abstract: The transfer map is used in group theory, in group cohomology, in algebraic topology and in the study of fusion systems. In this talk we will introduce the transfer map. The presentation will be motivated by the treatment of Die Verlagerung in Marshall Hall Jr.'s text Group Theory.

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Sept. 25

Sharply 2-transitive groups II presented by Clifton E. Ealy, Jr., Ph.D., Department of Mathematics, Western Michigan University

Abstract: In this talk we will recall elementary properties of transitive and 2-transitive groups. Next, we will discuss the basic theorem (1939) of Reinhold Baer connecting group theory and loop theory. Finally, we will recall Karzel's construction (1968) of a near-domain from a sharply 2-trasitive group.

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Sept. 18

Sharply 2-transitive groups I presented by Clifton E. Ealy, Jr., Ph.D., Department of Mathematics, Western Michigan University

Abstract: In this talk we will review sharply 2-transitive groups, near-fields and near-domains, as introduced in the Algebra Seminar during the academic year 2016-2017.

All are welcomed

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Sept. 11

Organizational Meeting presented by Clifton E. Ealy, Jr., Ph.D., Department of Mathematics, Western Michigan University

Abstract: This academic year the main thrust of the seminar will be Fusion Systems! But talks on other topics related to coding theory or algebraic geometry are welcomed. Historically, Fusion Systems arose in looking for conditions which tell us when a finite group, G, is not simple. For example, Burnside’s Theorem: If P ε Sylp(G) and P is a subgroup of Z(N G(P)), then G has a normal subgroup, H, such that G= H⋊P. Another example is Frobenius’s Normal p-complement Theorem: Let P ε Sylp(G). Then G= H⋊P if and only if N G(S) has a normal p-complement for every non-identity p-subgroup S of G. On the other hand, Frobenius’s Theorem on Frobenius groups: If G is transitive  permutation group such that Gxy=1 whenever x≠y and H is the set of fixed point free elements of G with 1 included, then H is a subgroup of G and G= H⋊Gx., played an important role in the development of Fusion Systems. So, the Seminar maybe viewed as a continuation of last years Algebra Seminar . The seminar in the main will be based on David Cravens text: The Theory of Fusion Systems. But other references are Aschbacher and Oliver paper “Fusion Systems”, Bulletin of the AMS 10/2016; Aschbacher, Kessar, and Oliver’s text: Fusion Systems in Algebra and Topology; and the text: Finite Groups III, Chapter 10, Local Finite Group Theory by Huppert & Blackburn.

All are welcome

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