287,474 research outputs found
Jacobson generators of the quantum superalgebra and Fock representations
As an alternative to Chevalley generators, we introduce Jacobson generators
for the quantum superalgebra . The expressions of all
Cartan-Weyl elements of in terms of these Jacobson generators
become very simple. We determine and prove certain triple relations between the
Jacobson generators, necessary for a complete set of supercommutation relations
between the Cartan-Weyl elements. Fock representations are defined, and a
substantial part of this paper is devoted to the computation of the action of
Jacobson generators on basis vectors of these Fock spaces. It is also
determined when these Fock representations are unitary. Finally, Dyson and
Holstein-Primakoff realizations are given, not only for the Jacobson
generators, but for all Cartan-Weyl elements of .Comment: 27 pages, LaTeX; to be published in J. Math. Phy
Invitation to the Psalms: A Reader’s Guide for Discovery and Engagement
Invitation to the psalms: a reader\u27s guide for discovery and engagement. Author: Karl Jacobson; Rolf A Jacobson. Publisher: Grand Rapids, Mich. : Baker Academic, 2013. ISBN: 978144125788
Semicrossed products of the disk algebra and the Jacobson radical
We consider semicrossed products of the disk algebra with respect to
endomorphisms defined by finite Blaschke products. We characterize the Jacobson
radical of these operator algebras. Furthermore, in the case the finite
Blaschke product is elliptic, we show that the semicrossed product contains no
nonzero quasinilpotent elements. However, if the finite Blaschke product is
hyperbolic or parabolic with zero hyperbolic step, the Jacobson radical is
nonzero and a proper subset of the set of quasinilpotent elements.Comment: 12 page
Too Good to Miss
Reviewed Book: Jacobson, J. Robert. Too Good to Miss. Calgary: Foothills Lutheran Press, 1977
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