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math.LO2023
Variations of rigidity
Sergey V. Sudoplatov
We study possibilities for semantic and syntactic rigidity, i.e., the rigidity with respect to automorphism group and with respect to definable closure. Variations of rigidity and…
math.LO2023
Algebraic closures and their variations
Sergey V. Sudoplatov
We study possibilities for algebraic closures, differences between definable and algebraic closures in first-order structures, and variations of these closures with respect to the…