1. Separations of Variables and Analytic Contractions on Two-Dimensional Hyperboloids

   • G. S. Pogosyan
   • A. Yakhno

   OriginalPaper 22 May 2019 Pages: 87 - 140

   

2. Interplay between Approximation Theory and Renormalization Group

   • V. I. Yukalov

   OriginalPaper 22 May 2019 Pages: 141 - 209

3. Terahertz Solitons in Condensed Media

   • A. N. Bugay

   OriginalPaper 22 May 2019 Pages: 210 - 229