On Depth and Depth+ of Boolean Algebras

• Autores: Shimon Garti, Saharon Shelah
• Localización: Algebra universalis, ISSN 0002-5240, Vol. 58, Nº. 2, 2008, págs. 243-248
• Idioma: inglés
• DOI: 10.1007/s00012-008-2065-1
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• Resumen

  • We show that the Depth+ of an ultraproduct of Boolean Algebras cannot jump over the Depth+ of every component by more than one cardinal. Consequently we have similar results for the Depth invariant.