Generalising the fan theorem

DOI10.1002/MALQ.201500016zbMath1469.03170OpenAlexW2609955872MaRDI QIDQ5108091

Silvio Valentini

Publication date: 29 April 2020

Published in: Mathematical Logic Quarterly (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1002/malq.201500016

Mathematics Subject Classification ID

Constructive and recursive analysis (03F60) Metamathematics of constructive systems (03F50) Subsystems of classical logic (including intuitionistic logic) (03B20)

Cites Work

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• Inductively generated formal topologies.
• Relative formal topology: the binary positivity predicate comes first
• Sublocales in formal topology
• Every countably presented formal topology is spatial, classically

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