Nonelliptic Partial Differential Equations : Analytic Hypoellipticity and the...

Partial Differential Equations by Lawrence C. Evans (hardcover, rare)

Non-Elliptic Partial Differential Equations : Analytic Hypoellipticity and th...

Nonelliptic Partial Differential Equations: Analytic Hypoellipticity and the-,

The Action Principle And Partial Differential Equations Demetrios Christodoulou

Textbooks in Mathematics Ser.: Partial Differential Equations : Analytical...

Nonelliptic Partial Differential Equations: Analytic Hypoellipticity and the Cou