1. Foreword

   • Fazal M. Mahomed

   Editorial Introduction Pages: 1 - 2

2. Continuation of Approximate Transformation Groups via Multiple Time Scales Method

   • V. A. Baikov
   • N. H. Ibragimov

   OriginalPaper Pages: 3 - 13

3. Symmetry Reductions of Equations for Solute Transport in Soil

   • P. Broadbridge
   • J. M. Hill
   • J. M. Goard

   OriginalPaper Pages: 15 - 27

4. Elliptic Curves and Three-Dimensional Flow Patterns

   • Brian J. Cantwell

   OriginalPaper Pages: 29 - 38

5. Global Wave Maps on Robertson–Walker Spacetimes

   • Yvonne Choquet-Bruhat

   OriginalPaper Pages: 39 - 47

6. Lie Point Symmetry Preserving Discretizations for Variable Coefficient Korteweg–de Vries Equations

   • V. Dorodnitsyn
   • P. Winternitz

   OriginalPaper Pages: 49 - 59

7. Contact Transformation Group Classification of Nonlinear Wave Equations

   • N. H. Ibragimov
   • S. V. Khabirov

   OriginalPaper Pages: 61 - 71

8. Approximate Transformation Groups and Renormgroup Symmetries

   • V. F. Kovalev

   OriginalPaper Pages: 73 - 83

9. On the Compatibility of Overdetermined Systems of Double Waves

   • S. V. Meleshko

   OriginalPaper Pages: 85 - 99

10. An Integrable Model of Nonstationary Rotationally Symmetrical Motion of Ideal Incompressible Liquid

    • V. V. Pukhnachov

    OriginalPaper Pages: 101 - 109

11. Periodic Solutions and Approximate Symmetries

    • G. Ünal

    OriginalPaper Pages: 111 - 120

12. Symmetry Breaking for a System of Two Linear Second-Order Ordinary Differential Equations

    • C. Wafo Soh
    • F. M. Mahomed

    OriginalPaper Pages: 121 - 133