Logan, J. David. , An introduction to nonlinear partial differential equations / J. David Logan. - 2nd ed. - xiii, 397 pages : illustrations ; 24 cm. - Pure and applied mathematics . ISBN: 0470225955 9780470225950 Subjects--Topical Terms: Differential equations, Nonlinear.Differential equations, Partial. LC Class. No.: QA377 / .L63 2008