Weak convergence and vector-valued functions: Improving the stability theory of Feynman's operational calculi

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In this paper we present a theorem that establishes a relation between continuous, norm-bounded functions from a metric space into a separable Hilbert space and weak convergence of sequences of probability measures on the metric space. After establishing this result, it's application to the stability theory of Feynman's operational calculi will be illustrated. We will see that the existing time-dependent stability theory of the operational calculi will be significantly improved when the operator-valued functions take their values in L(H) , H a separable Hilbert space.

Original languageEnglish
Pages (from-to)271-295
Number of pages25
JournalMathematical Physics Analysis and Geometry
Issue number4
Publication statusPublished - Nov 2007


All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)
  • Mathematical Physics
  • Mathematics(all)

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