Abstract

I consider the projectum of a \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document} $\beta$\end{document}-r.e. set. It is shown that there are tame r.e. sets with small projecta and that there are tame r.e. sets with large projecta.