Abstract
In this chapter we introduce two ideas important for the work to follow. The first of these is relational closure. In later chapters we will be especially interested in sets that are transitive. While there exist sets that are not transitive every set has a transitive extension. Indeed, every set has a smallest transitive extension which we call its transitive closure.
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© 1982 Springer-Verlag New York Inc.
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Takeuti, G., Zaring, W.M. (1982). Relational Closure and the Rank Function. In: Introduction to Axiomatic Set Theory. Graduate Texts in Mathematics, vol 1. Springer, New York, NY. https://doi.org/10.1007/978-1-4613-8168-6_9
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DOI: https://doi.org/10.1007/978-1-4613-8168-6_9
Publisher Name: Springer, New York, NY
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