Invariant Subsemigroups of Lie Groups (Memoirs of the American Mathematical Society No. 499)
By: Karl-Hermann Neeb (author)Paperback
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This work presents the first systematic treatment of invariant Lie semi groups. Because these semi groups provide interesting models for space times in general relativity, this work will be useful to both mathematicians and physicists. It will also appeal to engineers interested in bi-invariant control systems on Lie groups. Neeb investigates closed invariant subsemigroups of Lie groups which are generated by one-parameter semi groups and the sets of infinitesimal generators of such semi groups - invariant convex cones in Lie algebras.In addition, a characterization of those finite-dimensional real Lie algebras containing such cones is obtained. The global part of the theory deals with globality problems (Lie's third theorem for semi groups), controllability problems, and the facial structure of Lie semi groups. Neeb also determines the structure of the universal compactification of an invariant Lie semigroup and shows that the lattice of idempotents is isomorphic to a lattice of faces of the cone dual to the cone of infinitesimal generators.
Introduction Invariant cones in $K$-modules Lie algebras with cone potential Invariant cones in Lie algebras Faces of Lie semigroups Compactifications of subsemigroups of locally compact groups Invariant subsemigroups of Lie groups Controllability of invariant wedges Globality of invariant wedges Bohr compactifications The unit group of $S^\flat$ Faces and idempotents Examples and special cases References.
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- ID: 9780821825624
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