"1"^^ . "425413" . . "(I)-envelopes of closed convex sets in Banach spaces"@en . . . . . "Studujeme pojem (I)-generov\u00E1n\u00ED zaveden\u00FD V.Fonfem a J.Lindenstraussem a souvisej\u00EDc\u00ED pojem (I)-ob\u00E1lky. Dost\u00E1v\u00E1me snadn\u00FD d\u016Fkaz Jamesovy v\u011Bty pro prostory s w*-and\u011Blskou du\u00E1ln\u00ED koul\u00ED. Na p\u0159\u00EDkladu ukazujeme, \u017Ee takto nelze snadno dok\u00E1zat obecnou Jamesovu v\u011Btu."@cs . "(I)-envelopes of closed convex sets in Banach spaces"@en . . "(I)-ob\u00E1lky uzav\u0159en\u00FDch konvexn\u00EDch mno\u017Ein v Banachov\u00FDch prostorech"@cs . "(I)-envelopes of closed convex sets in Banach spaces" . . "162" . "We study the notion of (I)-generating introduced by V. Fonf and J. Lindendstrauss and a related notion of (I)-envelope. As a consequence of our results we get an easy proof of the James characterization of weak compactness in Banach spaces with weak* angelic dual unit ball and an easy proof of the James characterization of reflexivity within a large class of spaces. We also show by an example that the general James theorem cannot be proved by this method." . . "157;181" . . "(I)-envelopes of closed convex sets in Banach spaces" . "P(GA201/06/0018), Z(MSM0021620839)" . "0021-2172" . . . "RIV/00216208:11320/07:00004255" . . "IL - St\u00E1t Izrael" . . . "Kalenda, Ond\u0159ej" . "25"^^ . "We study the notion of (I)-generating introduced by V. Fonf and J. Lindendstrauss and a related notion of (I)-envelope. As a consequence of our results we get an easy proof of the James characterization of weak compactness in Banach spaces with weak* angelic dual unit ball and an easy proof of the James characterization of reflexivity within a large class of spaces. We also show by an example that the general James theorem cannot be proved by this method."@en . "11320" . "[AE5343A65AC5]" . . . "RIV/00216208:11320/07:00004255!RIV08-MSM-11320___" . "-envelopes; closed; convex; Banach; spaces"@en . "(I)-ob\u00E1lky uzav\u0159en\u00FDch konvexn\u00EDch mno\u017Ein v Banachov\u00FDch prostorech"@cs . . . "1" . "1"^^ . "Israel Journal of Mathematics" . .