Mackey's "method of little groups" describes the irreducible characters of a semidirect product G = HN when the normal subgroup N is abelian. I will introduce the method and give examples of interesting semidirect products of this form. Mackey's method can be used to construct supercharacter theories of G from supercharacter theories of H; I will give a few examples of know supercharacter theories that can be constructed using this method.
Mackey's Method of Little Groups and Applications to Supercharacter Theories
Sep. 24, 2013 1pm (MATH 220)
Grad Algebra/Logic
Julie Linman (CU Boulder) Reducts of Ramsey Structures, Part 2
Sep. 24, 2013 2pm (MATH 220)
Keith Kearnes, CU
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Alden Pixley asked in 1984 whether a congruence distributive variety in a finite language can have infinitely many subdirectly irreducible algebras, all finite. I will talk about the negative answer to this question.
Mackey's Method of Little Groups and Applications to Supercharacter Theories