Characterization of quasi idempotent in semigroups of full contraction mappings. Proc. Nig. Soc. Physi. Sci. Conf. [Internet]. 2024 Mar. 28 [cited 2025 Jan. 9];1(1):88. Available from: https://rans.nsps.org.ng/index.php/pnspsc/article/view/88