Set theory serves as a foundational pillar in mathematics, providing the language and tools necessary to discuss infinite collections. A central focus within this discipline is the study of cardinal ...

ERR (24A: Dip your paintbrush in your coffee, say) AD SLOGAN (42D: "Red Bull Gives You Wiiings," e.g.) INSPO (54D: Creative fuel, for short) CLOSING NUMBER: The word at the end (i.e. CLOSING) of each ...