%0 Journal Article %T On many-sorted $¦Ř$-categorical theories %A Enrique Casanovas %A Rodrigo Pel¨˘ez %A Martin Ziegler %J Mathematics %D 2010 %I arXiv %X We prove that every many-sorted $\omega$-categorical theory is completely interpretable in a one-sorted $\omega$-categorical theory. As an application, we give a short proof of the existence of non $G$--compact $\omega$-categorical theories. %U http://arxiv.org/abs/1012.4370v3