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From: Eustachius Hamamelis on 23 Jul 2010 13:53 Let E be a Banach space. Let x be a countably additive E-valued measure of finite variation vx on a (semi)ring S and ex its extension to the sigma-ring R generated by S. Extend vx to a countably additive measure evx on R. Let vex denote the variation of ex. Is vex=evx? Eustachius |