Jun, Y. B.; Lee, K. J.; Song, S. Z.
(ДЗ "ЛНУ імені Тараса Шевченка", 2018)
The notion of PI-quasi-valuation maps of a BCK-algebra is introduced, and related properties are investigated.The relationship between an I-quasi-valuation map and a PI-quasivaluation map is examined. Conditions for an ...