Complex Interpolation of Operators and Optimal Domains |
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Authors: | Ricardo del Campo Antonio Fernández Orlando Galdames Fernando Mayoral Francisco Naranjo |
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Institution: | 1. Dpto. Matemática Aplicada I, E.T.S.I.A. Carretera de Utrera km 1, 41013, Seville, Spain 2. Dpto. Matemática Aplicada II, E.T.S.I. Camino de los Descubrimientos s/n, 41092, Seville, Spain 3. C/Goleta, 46009, Valencia, Spain
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Abstract: | Let X 0 and X 1 be two order continuous Banach function spaces on a finite measure space, (E 0, E 1) a Banach space interpolation pair, and \({T: X_0 + X_1 \to E_0 + E_1}\) an admissible operator between the pairs (X 0,X 1) and (E 0,E 1). If \({T_{\theta} : X_0, X_1]_{\theta ]} \to E_0, E_1]_{\theta]}}\) is the interpolated operator by the first complex method of Calderón and m 0, m 1 and m θ are the vector measures coming from \({{T\vert}_{X_0}}\) and \({{T\vert}_{X_1}}\) and T θ, respectively, then we study the relationship between the optimal domain \({L^1(m_{\theta})}\) of T θ and the complex interpolation space \({L^1(m_0),L^1(m_1)]_{\theta]}}\) of the optimal domains of \({{T\vert}_{X_0}}\) and \({{T\vert}_{X_1}}\) . Then, we apply the obtained result to study interpolation of p-th power factorable and bidual (p,q)-power-concave operators. |
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