PUBLICATIONS DE L'INSTITUT MATHÉMATIQUE (BEOGRAD) (N.S.) Vol. 61(75), pp. 1720 (1997) 

It is consistent that there exists an $\eta_1$ordered real closed field which is not hyperrealJadran Stojanovi\'c and \v Zikica Perovi\'cFilozofski fakultet, Nis, YugoslaviaAbstract: We provide an example of a model of ZFC in which there exists an $\eta_1$ordered real closed field which is not a hyperreal field. Classification (MSC2000): 12J15; 03E05 Full text of the article:
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