Let G be a closed subgroup of S-infinity and X be a Polish G-space. To every x is an element of X we associate an admissible set A(x) and show how questions about X which involve Baire category can be formalized in A(x). (C) 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
机构:
Univ Santiago de Compostela, Fac Matemat, Santiago De Compostela 15706, SpainUniv Santiago de Compostela, Fac Matemat, Santiago De Compostela 15706, Spain