Positive abstraction and extensionality

Journal of Symbolic Logic 68 (3):828-836 (2003)
It is proved in this paper that the positive abstraction scheme is consistent with extensionality only if one drops equality out of the language. The theory obtained is then compared with GPK, a wellknown set theory based on an extended positive comprehension scheme
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DOI 10.2178/jsl/1058448441
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References found in this work BETA
Th Skolem (1963). Studies on the Axiom of Comprehension. Notre Dame Journal of Formal Logic 4 (3):162-170.

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Citations of this work BETA
Tore Fjetland Øgaard (2016). Paths to Triviality. Journal of Philosophical Logic 45 (3):237-276.

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