참고문헌
- R. Feynman, An operator calculus having applications in quantum electrodynamics, Phys. Rev. 84 (1951), 108-128. https://doi.org/10.1103/PhysRev.84.108
- B. Jefferies and G.W. Johnson, Feynman's operational calculi for noncommuting operators: Definitions and elementary properties, Russian J. Math. Physics 8 (2001), 153-178.
- B. Jefferies and G.W. Johnson, Feynman's operational calculi for noncommuting operators: Tensors, ordered supports and disentangling an exponential factor, Math. Notes 70 (2001), 744-764. (Translated from Matematicheskie Zametki, vol. 70, no. 6, 2001, 815-838.) https://doi.org/10.1023/A:1012903732597
- B. Jefferies, G.W. Johnson and B.S. Kim, Feynman's operational calculi: methods for iterative disentangling, Acta Appl. Math. 92 (2006), 293-309. https://doi.org/10.1007/s10440-006-9061-2
- B. Jefferies, G.W. Johnson and L. Nielsen, Feynman's operational calculi for time dependent noncommuting operators, Proc. of the Seoul Conf. on the Feynman integral and related topics (July, 1999), J. Korean Math. Soc. 38 (2001), 193-226.
- G.W. Johnson and B.S. Kim, Extracting linear and bilinear factors in Feynman's operational calculi, Math. Phys. Anal. Geom. 6 (2003), 181-200. https://doi.org/10.1023/A:1024049113118
- G.W. Johnson and B.S. Kim, Derivational derivatives and Feynman's operational calculi, Houston J. Math. 35 (2009), 647-664.
- G.W. Johnson and M.L. Lapidus, The Feynman Integral and Feynman's Operational Calculus, Oxford U. Press, Oxford Mathematical Monograph, 2000. (Oxford U. Press paperback, 2002.)
- G.W. Johnson and M.L. Lapidus and Lance Nielsen, Feynman's Operational Calculus and Beyond, Oxford U. Press (2015).
- V.P. Maslov, Operational Methods, Mir, Moscow, 1976.
- V.E. Nazaikinskii, V.E. Shatalov and B.Yu. Sternin, Methods of Noncommutative Analysis, Walter de Gruyter, Studies in Math. 22, Berlin/New York, 1996.
- L. Nielsen, Effects of absolute continuity in Feynman's operational calculi, Proc. Amer. Math. Soc. 131 (2003), 781-791. https://doi.org/10.1090/S0002-9939-02-06592-9