Linear forms in logarithms and applications The aim of this book is to serve as an introductory text to the theory of linear forms in the logarithms of algebraic numbers with a special emphasis on a large variety of its applications. We wish to help students and researchers to learn what is hidden inside the blackbox ‚Bakers theory of linear forms in logarithms (in complex or in $p$ adic logarithms) and how this theory applies to many Diophantine problems including the e#xB;ffective resolution of Diophantine equations the $abc$ conjecture and upper bounds for the irrationality measure of some real numbers. Written for a broad audience this accessible and self contained book can be used for graduate courses (some 30 exercises are supplied). Specialists will appreciate the inclusion of over 30 open problems and the rich bibliography of over 450 references