TY - JOUR AB - We extend to infinite dimensions an explicit formula of Chill, Fašangová, Metafune, and Pallara for the optimal angle of analyticity of analytic Ornstein-Uhlenbeck semigroups. The main ingredient is an abstract representation of the Ornstein-Uhlenbeck operator in divergence form. AU - Jan Maas AU - van Neerven, Jan M ID - 2118 IS - 3 JF - Archiv der Mathematik TI - On analytic Ornstein-Uhlenbeck semigroups in infinite dimensions VL - 89 ER -