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Densities of Ultraproducts of Boolean Algebras
Published online by Cambridge University Press: 20 November 2018
We answer three problems by J. D. Monk on cardinal invariants of Boolean algebras. Two of these are whether taking the algebraic density πA resp. the topological density cL4 of a Boolean algebra A commutes with formation of ultraproducts; the third one compares the number of endomorphisms and of ideals of a Boolean algebra.
- Research Article
- Copyright © Canadian Mathematical Society 1995