TY - JOUR AU - N. A. Izobov PY - 2007/02/25 Y2 - 2024/03/28 TI - On the countability of the number of solutions of a two-dimensional linear Pfaff system with different characteristic sets JF - Ukrains’kyi Matematychnyi Zhurnal JA - Ukr. Mat. Zhurn. VL - 59 IS - 2 SE - Research articles DO - UR - https://umj.imath.kiev.ua/index.php/umj/article/view/3302 AB - We prove that a two-dimensional, completely integrable, linear Pfaff system has at most countably many solutions with all different characteristic sets. ER -