Drushlyak M, Lukashova T, Pidopryhora A, Ielizarenko D, Nadtochyi O. DIGITAL TOOLS IN THE TRAINING OF FUTURE PHD IN MATHEMATICS: A CASE STUDY OF GROUPS WITH RESTRICTIONS ON THE NORMS OF GIVEN SUBGROUP SYSTEMS. Osvìta, ìnnovatika, praktika. 2024;12(3):26-32. doi:10.31110/2616-650X-vol12i3-004