释义 |
Helmholtz Differential Equation--Parabolic CoordinatesThe Scale Factors are , and the separation functions are, , , given a Stäckel Determinant of. The Laplacian is
| (1) |
Attempt Separation of Variables by writing
| (2) |
then the Helmholtz Differential Equation becomes
| (3) |
Now divide by ,
| (4) |
Separating the part,
| (5) |
| (6) |
so
| (7) |
which has solution
| (8) |
and
| (9) |
| (10) |
This can be separated
| (11) |
| (12) |
so
| (13) |
| (14) |
References
Arfken, G. ``Parabolic Coordinates .'' §2.12 in Mathematical Methods for Physicists, 2nd ed. Orlando, FL: Academic Press, pp. 109-111, 1970.Morse, P. M. and Feshbach, H. Methods of Theoretical Physics, Part I. New York: McGraw-Hill, pp. 514-515 and 660, 1953. |