Helmholtz Differential Equation--Confocal Paraboloidal Coordinates

As shown by Morse and Feshbach (1953), the Helmholtz Differential Equation is separable in ConfocalParaboloidal Coordinates.

References

Morse, P. M. and Feshbach, H. Methods of Theoretical Physics, Part I. New York: McGraw-Hill, p. 664, 1953.

• Lyapunov Function
• Lyapunov's First Theorem
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• Lyndon Word
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