Umar A

Публикации в базе данных Math-Net.Ru

1. On certain semigroups of contraction mappings of a finite chain
   
   Algebra Discrete Math., 32:2 (2021),  299–320
2. Some combinatorial problems in the theory of partial transformation semigroups
   
   Algebra Discrete Math., 17:1 (2014),  110–134
3. Some combinatorial problems in the theory of symmetric inverse semigroups
   
   Algebra Discrete Math., 9:2 (2010),  115–126