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Completeness theorem for topological class models

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Abstract

A topological class logic is an infinitary logic formed by combining a first-order logic with the quantifier symbols O and C. The meaning of a formula closed by quantifier O is that the set defined by the formula is open. Similarly, a formula closed by quantifier C means that the set is closed. The corresponding models are a topological class spaces introduced by Ćirić and Mijajlović (Math Bakanica 1990). The completeness theorem is proved.

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Correspondence to Radosav Djordjevic.

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This research was supported by the Ministry of Science, Technology and Development, Republic of Serbia, through Mathematical Institute, under grant 144013.

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Djordjevic, R., Ikodinović, N. & Mijajlović, Ž. Completeness theorem for topological class models. Arch. Math. Logic 46, 1–8 (2007). https://doi.org/10.1007/s00153-006-0014-2

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  • DOI: https://doi.org/10.1007/s00153-006-0014-2

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