Piękosz, Artur Semilinear and semialgebraic loci of o-minimal sets. (English) Zbl 0990.03030 Ill. J. Math. 45, No. 4, 1351-1359 (2001). MSC: 03C64 14P10 PDFBibTeX XMLCite \textit{A. Piękosz}, Ill. J. Math. 45, No. 4, 1351--1359 (2001; Zbl 0990.03030)
Dougherty, Randall; Miller, Chris Definable Boolean combinations of open sets are Boolean combinations of open definable sets. (English) Zbl 0991.54006 Ill. J. Math. 45, No. 4, 1347-1350 (2001). MSC: 54A99 03C64 PDFBibTeX XMLCite \textit{R. Dougherty} and \textit{C. Miller}, Ill. J. Math. 45, No. 4, 1347--1350 (2001; Zbl 0991.54006)