%0 Journal Article %T Characterization and uniqueness of $¦Ò$-Antisets %A Ivan Gatica Araus %J Mathematics %D 2009 %I arXiv %X In this article, we prove that if there exists a $\sigma$-antiset $X^{*}$, of a $\sigma$-set $X$, then it is unique and therefore we can present a characterization of the $\sigma$-antiset. %U http://arxiv.org/abs/0906.4742v2