Volume 239, Issue 1, May 2019

This issue is a translation of Ukrains’kiĭ Matematychnyĭ Visnyk (Ukrainian Mathematical Bulletin) Vol. 15, No. 2, 2018. International Editorial Board of Ukrains’kiĭ Matematychnyĭ Visnyk: M. Atiyah, B. Bojarski, A. Friedman, O. Martio, L. Nirenberg, A. Samoilenko (Editor-in-Chief).

ISSN: 1072-3374 (Print) 1573-8795 (Online)