
This book deals with the study of superconductivity in systems with coexisting wide and narrow bands. It has been previously suggested that superconductivity can be enhanced in systems with coexisting wide and narrow bands when the Fermi level is near the narrow band edge...

Introduction.- Background of the Present Thesis.- Method.- FLEX+DMFT Analysis for Superconductivity in Systems With Coexisting Wide and Narrow Bands.- Possible High-Tc Superconductivity in "hidden ladder" Materials.- Conclusion.- Appendices.