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Titlebook: Cardinal Functions on Boolean Algebras; J. Donald Monk Book 1990 Springer Basel AG 1990 algebra.Boolean algebra.cardinal function.function

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樓主: bradycardia
51#
發(fā)表于 2025-3-30 09:28:42 | 只看該作者
52#
發(fā)表于 2025-3-30 13:11:30 | 只看該作者
Number of Ultrafilters, subalgebra or homomorphic image of ., then |Ult.| ≤ |Ult.|. For weak products we have .. The situation for full products is more complicated: ., where . = Σ. d... This follows from the following two facts: .where “→” means “is isomorphically embeddable in”, and “U” means “disjoint union”. Next, cle
53#
發(fā)表于 2025-3-30 18:04:38 | 只看該作者
Introduction, shortly be more specific about what these three general questions amount to. The purpose of these notes is to survey this area of the theory of BA’s, giving proofs for a large number of results, some of which are new, mentioning most of the known results, and formulating open problems. The open pro
54#
發(fā)表于 2025-3-30 22:22:30 | 只看該作者
https://doi.org/10.1007/0-387-31609-4 shortly be more specific about what these three general questions amount to. The purpose of these notes is to survey this area of the theory of BA’s, giving proofs for a large number of results, some of which are new, mentioning most of the known results, and formulating open problems. The open pro
55#
發(fā)表于 2025-3-31 02:33:35 | 只看該作者
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60#
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