Tjark Weber. International Journal of Algebra, 3(5):199-210, 2009.
A groupoid consists of a set G equipped with a binary operation. This article examines the relationship between commutativity and various (less common) groupoid identities between products with 3 factors, e.g., (xy)z = (yz)x. We systematically study all 12 identities of this form to identify additional conditions (e.g., unitality) that are sufficient for commutativity. Automated deduction techniques were used in several parts of the work.
@article{weber09commutativity, author = {Tjark Weber}, title = {On Commutativity and Groupoid Identities between Products with 3 Factors}, journal = {International Journal of Algebra}, volume = {3}, number = {5}, pages = {199--210}, year = {2009} }