Volume 17, Issue 2 (9-2022)                   IJMSI 2022, 17(2): 75-86 | Back to browse issues page


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Abstract:  
We prove that continuous sentences preserved by the ultramean construction (a generalization of the ultraproduct construction) are exactly those sentences which are approximated by linear sentences. Continuous sentences preserved by linear elementary equivalence are exactly those sentences which are approximated in the Riesz space generated by linear sentences. Also, characterizations for linear $Delta_n$-sentences and positive linear theories will be given.
Type of Study: Research paper | Subject: Special

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