Mathematics – Logic
Scientific paper
2000-09-07
Mathematics
Logic
Scientific paper
In this paper we investigate some properties of first order theories which prevent them from having universal models under certain cardinal arithmetic assumptions. Our results give a new syntactical condition, oak property, which is a sufficient condition for a theory not to have universal models in cardinality lambda when certain cardinal arithmetic assumptions implying the failure of GCH (and close to the failure of SCH) hold.
Džamonja Mirna
Shelah Saharon
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