New trends in theoretical developments and computational methods

Apparatus of Group Analysis Lie-Backlund Symmetries: Representation by Formal Power Series Approximate Transformation Groups Differential Equations with Distributions: Group Theoretic Treatment of Fundamental Solutions Recursions Calculation of Symmetry Groups for Integro-Differential Equations Body of Results Group Theoretic Modeling Generalized Hydrodynamic-Type Systems Ordinary Differential Equations Differential Equations with a Small Parameter: Exact and Approximate Symmetries Differential Constraints Non-Classical and Conditional Symmetries Quasi-Exactly-Solvable Differential Equations Computational Methods Symbolic Software for Lie Symmetry Analysis Interactive REDUCE Programs for Caculating Lie Point, Non-Classical, Lie-Backlund, and Approximate Symmetries of Differential Equations: Manual and Floppy Disk