class 27, Oct 19,2023

2023-10-19 11:39:26 +05:30 · 2023-10-19 11:39:26 +05:30 · 1ce05fa9fe
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+Applications of CT
+
+-- class of structures which has finitely many elements is not
+definable in FO with equality.
+
+-- class of graphs G=(V,E,a,b) where there is a path from a to b is
+not definable in FO with signature <{a,b},{},{R(,)}> 
+