Doostabadi, A.; Farrokhi, D.G.
(ДЗ "ЛНУ імені Тараса Шевченка", 2017)
The (proper) power graph of a group is a graph whose vertex set is the set of all (nontrivial) elements of the group and two distinct vertices are adjacent if one is a power of the other. Various kinds of planarity of ...