Hydon, Peter E. Symmetry methods for differential equations: A beginner's guide Peter E. Hydon - New York : Cambridge University Press, 2000 - xi, 213 p. ill. ; 24 cm - Cambridge texts in applied mathematics . Bibliografie p. 209Index p. 211 eng ISBN: 0521497035 LCCN: 99031354 Subjects--Topical Terms: Differential equations--Numerical solutions.Symmetry.Mathematical physics. LC Class. No.: QC20.7.D5 Dewey Class. No.: 515.35