Duality Mappings and the Existence of Periodic Solutions for Non-autonomous Second Order Systems
نویسندگان
چکیده
is a vector version of p-Laplacian operator. In order to say what we understand by solution for the problem (1.1), (1.2) we remind some basic results concerning the W 1,p T -spaces. Let C T be the space of indefinitely differentiable T -periodic functions from R to R . We denote by 〈·, ·〉 the inner product on R and by ‖ · ‖, the norm generated by this inner product (the same meaning is applied for the ‖ · ‖-norm involved in (1.1)).
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