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Proceedings of the American Mathematical Society

Published by the American Mathematical Society since 1950, Proceedings of the American Mathematical Society is devoted to shorter research articles in all areas of pure and applied mathematics.

ISSN 1088-6826 (online) ISSN 0002-9939 (print)

The 2020 MCQ for Proceedings of the American Mathematical Society is 0.85.

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Effects of absolute continuity in Feynman’s operational calculus
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by Lance Nielsen PDF
Proc. Amer. Math. Soc. 131 (2003), 781-791 Request permission


We investigate the effects of having an absolute continuity relation between the time-ordering measures in Feynman’s operational calculus. In particular, we obtain some theorems concerning the formation of functions of several noncommuting operators or operator-valued functions under specific absolute continuity assumptions on the time-ordering measures.
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Additional Information
  • Lance Nielsen
  • Affiliation: Department of Mathematics and Computer Science, Creighton University, Omaha, Nebraska 68178-2090
  • Email:
  • Received by editor(s): July 10, 2001
  • Received by editor(s) in revised form: October 10, 2001
  • Published electronically: July 17, 2002
  • Communicated by: N. Tomczak-Jaegermann
  • © Copyright 2002 American Mathematical Society
  • Journal: Proc. Amer. Math. Soc. 131 (2003), 781-791
  • MSC (2000): Primary 47A60, 46H30; Secondary 47A56, 47B38
  • DOI:
  • MathSciNet review: 1937417