تلخیص
The concept of left (resp. right) unar groupoid is extended to introduce left (resp. right) unar LA-semigroup as new
subclasses of LA-semigroup. These subclasses are enumerated up to
order 6 and some basic relations of these classes with other known
subclasses of LA-semigroup and with other relevant algebraic structures are investigated. Furthermore, a variety of examples and
counterexamples are provided using the latest computational techniques of GAP, Mace-4 and Prover-9.