Abstract
In this chapter we introduce first the essential notion of a control function. Its importance will come out when, in Chapter 8, we determine the cofinalities of partial orderings of the form ([λ]≤k, ⊑).
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© 1999 Springer Basel AG
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Holz, M., Steffens, K., Weitz, E. (1999). The Supremum of pcf μ (a). In: Introduction to Cardinal Arithmetic. Modern Birkhäuser Classics. Birkhäuser, Basel. https://doi.org/10.1007/978-3-0346-0330-0_7
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DOI: https://doi.org/10.1007/978-3-0346-0330-0_7
Publisher Name: Birkhäuser, Basel
Print ISBN: 978-3-0346-0327-0
Online ISBN: 978-3-0346-0330-0
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