Today Lie group theoretical approach to differential equations has been extended to new situations and has become applicable to the majority of equations that frequently occur in applied sciences. Newly developed theoretical and computational methods are awaiting application. Students and applied scientists are expected to understand these methods. Volume 3 and the accompanying software allow readers to extend their knowledge of computational algebra.
Written by the world's leading experts in the field, this up-to-date sourcebook covers topics such as Lie-Bcklund, conditional and non-classical symmetries, approximate symmetry groups for equations with a small parameter, group analysis of differential equations with distributions, integro-differential equations, recursions, and symbolic software packages. The text provides an ideal introduction to the modern group analysis and addresses issues to both beginners and experienced researchers in the application of Lie group methods.

Part A. APPARATUS OF GROUP ANALYSIS
Ⅰ LIE THEORY OF DIFFERENTIAL EQUATIONS
1. One-Parameter Transformation Groups
2. Integration of Second-Order Ordinary Differential Equations
3. Group Classification of Second-Order Ordinary Differential Equation
4. Invariant Solutions
Ⅱ GENERALIZATIONS
5. Lie-Backlund Transformation Groups
6. Noether-Type Conservation Theorems
7. Nonlocal Symmetry Generators via Backlund Transformations
Part B. BODY OF RESULTS
8. Ordinary Differential Equations
9. Second-Order Partial Differential Equations with Two Independent Variables
10. Evolution Equations Ⅰ: Diffusion Equations
11. Evolution Equations Ⅱ: General Case
12. Wave Equations
13. Hydrodynamics and Gasdynamics
14. Hydrodynamic-Type Systems
15. Integrodifferential Equations
Part C. COMPUTER ASPECTS
16. Applications of Group Theory in Computation-A Survey
17. Symmetry of Finite-Difference Equations

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