On DEPTH and DEPTH^+ of Boolean Algebras
arXiv:math/0512217 · doi:10.1007/s00012-008-2065-1
Abstract
We show that the Depth^+ of an ultraproduct of Boolean Algebras, can not jump over the Depth^+ of every component by more than one cardinality. We can have, consequently, similar results for the Depth invariant.