Set Theorists,
Is there ever a reason to assign a cardinalityI am trying to a proper class? If so, isdefine an embedding whose range includes classes. Is there a coherent way of assigning "cardinality" to do this? Or is it just accepted that classes do not have cardinality, as in if there was a survey question that asks "What is your cardinality?" the sets would mark their cardinality andproper classes would mark "n/a"?
I am currently reading about Hausdorff gaps in Jech and while this is not part ofAmong the readingimportant classes to consider are those Boolean algebras which name generic extensions. In other words, those classes of the question arose while I was learninguniverse which reflect the multiverse.