Calculus Of Variations And Partial Differential Equations Of First Order

In this second English edition, the two volumes of the first edition have been combined. One basic fact forms the book's rationale: the fundamental relationship... » 

In this second English edition, the two volumes of the first edition have been combined. One basic fact forms the book's rationale: the fundamental relationship between the differential equations that occur in the calculus of variations and partial differential equations of the first order. «