1998/05/15 by Menachem Magidor, Saharon Shelah, Magidor, Menachem +1
Mathematics · #FOS: Mathematics #General Topology (math.GN) #Logic (math.LO) #math.GN #math.LO
paper · pdf · doi:10.48550/arxiv.math/9805145
published as Math. Japon. 48 No. 2 (1998) 301--307
arxiv created 1998/05/15 · arxiv updated 2009/11/30
We prove the consistency with ZFC of ``the length of an ultraproduct of Boolean algebras is smaller than the ultraproduct of the lengths''. Similarly for some other cardinal invariants of Boolean algebras.