Abstract.
A detailed study is made of matrix-valued, ordinary linear differential operators T in \(L^{p}({\mathbb{R}},{{\mathbb{C}}^{N}})\) for 1 < p < ∞, which arise as the perturbation of a constant coefficient differential operator of order n ≥ 1 by a lower order differential operator \(S = {\sigma_{j=0}^{n--1}} F_{j}(x)(--i\frac{d}{dx})^{j}\) which has a factorisation S = AB for suitable operators A and B. Via techniques from L p-harmonic analysis, perturbation theory and local spectral theory, it is shown that T satisfies certain local resolvent estimates, which imply the existence of local functional calculi and decomposability properties of T.
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Albrecht, E., Ricker, W.J. Spectral Properties of Some Linear Matrix Differential Operators in L p-spaces on \({\mathbb{R}}\) . Integr. equ. oper. theory 59, 449–489 (2007). https://doi.org/10.1007/s00020-007-1542-9
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DOI: https://doi.org/10.1007/s00020-007-1542-9