Canonical and Hamiltonian Formalism Applied to the Sturm-liouville Equation

نویسنده

  • M. A. BIOT
چکیده

The Strum-Liouville equation is expressed in Hamiltonian form. A simple generating function is derived which defines a large class of canonical transformations and reduces the Sturm-Liouville equation to the solution of a first order equation with a single unknown. The method is developed with particular reference to the wave equation. The procedure unifies many apparently diverse treatments and leads to new insights and procedures. Some new transformations are obtained, useful in the turning point region and for the improvement of accuracy in the region of validity of W.K.B. solutions. In addition a new power series expansion near the turning point is obtained. 1. Standard canonical form of the Sturm-Liouville equation. Let cl, p be conjugate variables and f, g arbitrary functions of the independent coordinate x. The Hamiltonian: defines the canonical equations dq 1, z=f dp -= dz --sq which are equivalent to the second order equation $ f2 +scr=o, ( ) (1.1)

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تاریخ انتشار 1998