Abstract
Let A be a densely defined, closed linear operator (which we shall call maximal operator) with domain D(A) on a Banach space X and consider closed linear operators L:D(A)→∂X and Φ:D(A)→∂X (where ∂X is another Banach space called boundary space). Putting conditions on L and Φ, we show that the second order abstract Cauchy problem for the operator A Φ with A Φ u=Au and domain D(A Φ):={u∈D(A):Lu=Φu} is well-posed and thus it generates a cosine operator function on the Banach space X.
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Communicated by Jerome A. Goldstein.
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Alvarez-Pardo, E. Perturbing the boundary conditions of the generator of a cosine family. Semigroup Forum 85, 58–74 (2012). https://doi.org/10.1007/s00233-011-9361-3
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DOI: https://doi.org/10.1007/s00233-011-9361-3