Symbol calculus for singular integrals with operator-valued PQC-coefficients

The symbol calculus for singular integral operators with piecewise continuous coefficients created by Gohberg and Krupnik in the early seventies as well as its generalization to piecewise quasicontinuous coefficients due to Sarason and Silbermann are derived for operators with operator-valued coefficients, The approach is based upon localization techniques in combination with a general two-projections-theorem.