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A note on the equivalence between even order Sturm-Liouville equations and symplectic systems on time scales. (English) Zbl 1348.34146
Summary: The $$2n$$th-order Sturm-Liouville differential and difference equations can be written as linear Hamiltonian differential systems and symplectic difference systems, respectively. In this work, a similar result is given for the $$2n$$th-order Sturm-Liouville equation on time scales using time reversed symplectic dynamic systems. Moreover, we show that this transformation preserves the value of the corresponding quadratic functionals which enables a further generalization of the theory for continuous and discrete Sturm-Liouville equations.

##### MSC:
 34N05 Dynamic equations on time scales or measure chains 34B24 Sturm-Liouville theory 34B20 Weyl theory and its generalizations for ordinary differential equations 39A12 Discrete version of topics in analysis
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