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  1. Punctual definability on structures.Iskander Kalimullin, Alexander Melnikov & Antonio Montalban - 2021 - Annals of Pure and Applied Logic 172 (8):102987.
    We study punctual categoricity on a cone and intrinsically punctual functions and obtain complete structural characterizations in terms of model-theoretic notions. As a corollary, we answer a question of Bazhenov, Downey, Kalimullin, and Melnikov by showing that relational structures are not punctually universal. We will also apply this characterisation to derive an algebraic characterisation of relatively punctually categorical mono-unary structures.
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