Linear differential equations are the central topic of this volume, unified by the Galois theory. The book covers algebraic theory, formal theory, classificatio... » 

Linear differential equations are the central topic of this volume, unified by the Galois theory. The book covers algebraic theory, formal theory, classification, algorithms to decide solvability in finite terms, monodromy and Hilbert's 21st problem, asymptotics, the inverse problem and more. «