Valentin A. Zagrebnov is an Emeritus Professor of Aix-Marseilles University. He is a member of the Institut de Mathématiques de Marseille - UMR 7373 and its research group on Analysis, Geometry and Topology. 

Semigroups and their generators.- Classes of compact operators.- Trace inequalities.- Gibbs semigroups.- Product formulae for Gibbs semigroups.- Product formulae in symmetrically-normed ideals.- Product formulae in Dixmier ideal.- Appendix A. Spectra of closed operators.- Appendix B. Inequalities in ideals.- Appendix B. More inequalities.- Appendix C. Kato functions.- Appendix D. Lie-Trotter-Kato product formulae: comments on the bibliography.- Bibliography.- Index