رضا شرف دینی

This thesis ranges over the injective properties C-injectivity and CC-injectivity in the category of right systems over a monoid S, with an approach to the limit notions as prod-ucts and equalizers and to their duals. Besides, we classify monoids based on injective properties C-injectivity and CC-injectivity. This thesis presents new results on pereservation of injective properties under limits and colimits.