It is consistent that there exists an ordered real closed field which is not hyper-real.
Stojanović, Jadran, Perović, Žikica (1997)
Publications de l'Institut Mathématique. Nouvelle Série
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Stojanović, Jadran, Perović, Žikica (1997)
Publications de l'Institut Mathématique. Nouvelle Série
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van Wouwe, J. M.
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Arens, Richard (1951)
Portugaliae mathematica
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Kent, Darrell C., Richmond, T.A. (1990)
International Journal of Mathematics and Mathematical Sciences
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Ai-Jun Xu (2015)
Open Mathematics
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In this paper, we show that any generalized ordered space X is monotonically (countably) metacompact if and only if the subspace X - { x } is monotonically (countably) metacompact for every point x of X and monotone (countable) metacompact property is hereditary with respect to convex (open) subsets in generalized ordered spaces. In addition, we show the equivalence of two questions posed by H.R. Bennett, K.P. Hart and D.J. Lutzer.
J. Blair Roll (1993)
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