MathSciNet bibliographic data MR1091232 (92b:12013) 12J15 (12D15 14P10 14P99) Robson, Robert O. Separating points from closed convex sets over ordered fields and a metric for $\tilde R{}\sp n$$\tilde R{}\sp n$. Trans. Amer. Math. Soc. 326 (1991), no. 1, 89–99. Article

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