Nonorthogonal R-separable coordinates for four-dimensional complex Riemannian spaces
J. Math. Phys. 22, 42 (1981); doi:10.1063/1.524753
Issue Date: January 1981
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We classify all R-separable coordinate systems for the equations
4
=![[script J]](http://scitation.aip.org/servlet/GetImg?key=JMAPAQ000022000001000042000001%3A0%3A0%3A28&t=a&d=a)
g−1/2
j(g1/2gi j
i
) =0 and ![[script J]](http://scitation.aip.org/servlet/GetImg?key=JMAPAQ000022000001000042000001%3A0%3A0%3A28&t=a&d=a)
gi j
iW
jW =0 with special emphasis on nonorthogonal coordinates, and give a group theoretic interpretation of the results. For flat space we show that the two equations separate in exactly the same coordinate systems and present a detailed list of the possibilities. We demonstrate that every R-separable system for the Laplace equation
4
=0 on a conformally flat space corresponds to a separable system for the Helmholtz equations
4
=
on one of the manifolds E4, S1×S3, S2×S2, and S4.
Journal of Mathematical Physics is copyrighted by The American Institute of Physics.
4
=
j(g1/2gi j
i
) =0 and
iW
jW =0 with special emphasis on nonorthogonal coordinates, and give a group theoretic interpretation of the results. For flat space we show that the two equations separate in exactly the same coordinate systems and present a detailed list of the possibilities. We demonstrate that every R-separable system for the Laplace equation
4
=0 on a conformally flat space corresponds to a separable system for the Helmholtz equations
4
=
on one of the manifolds E4, S1×S3, S2×S2, and S4.
Journal of Mathematical Physics is copyrighted by The American Institute of Physics.
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KEYWORDS and PACS
PUBLICATION DATA
0022-2488 (print)
1089-7658 (online)
REFERENCES (11)
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- E. G. Kalnins and W. Miller, Jr.,
J. Phys. A 12, 1129 (1979 ). - E. G. Kalnins and W. Miller, Jr., J. Math. Anal. Appl. (to appear).
- L. P. Eisenhart, Riemannian Geometry, 2nd printing (Princeton U.P., Princeton, 1949), pp. 89–92.
- W. Miller, Jr., Symmetry and Separation of Variables (Addison-Wesley, Reading, Mass., 1977).







