Partial differential equations / Fritz John - 4th. ed. - New York : Springer, c1982 - x, 249 p. : il.; 24 cm. - Applied Mathematical Sciences ; 1 .
Bibliografía: p. 241-242 Glosario: 243 Incluye problemas al final de los capítulos
The single first-order equations, hiperbolic equations for functions of two independent variables. Characteristic manifolds and the cauchy problem. The Laplace equation. Hyperbolic equations in higher dimensions. Higher-order elliptic equations with constant coefficente. Parabolic equations. H. Lewy'example of a linear equation without solutions.