Abstract.
We study an abstract second order nonlinear evolution equation in a real Hilbert space. We consider time-dependent convex functions and their subdifferentials operating on the first derivative of the unknown function. Introducing appropriate assumptions on the convex functions and other data, we prove the existence and uniqueness of a strong solution, and give some applications of the abstract theorem to hyperbolic variational inequalities with time-dependent constraints.
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Kubo, M. Second order evolution equations with time-dependent subdifferentials. J. evol. equ. 7, 701–717 (2007). https://doi.org/10.1007/s00028-007-0332-9
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DOI: https://doi.org/10.1007/s00028-007-0332-9