
doi: 10.4171/zaa/431
The existence of periodic solutions and duality results for an abstract differential equation in HiIbert space are established. The dual variational method and a modification of the duality theory of Toland are used.
Hilbert space, existence, subdifferential, duality, duality results, periodic solutions, Nonlinear differential equations in abstract spaces, nonlinear evolution equation
Hilbert space, existence, subdifferential, duality, duality results, periodic solutions, Nonlinear differential equations in abstract spaces, nonlinear evolution equation
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