Countable

second countable σ compact countably discrete variable enumerable countability indefinite article bijection cardinal number denumerability axiom of countable choice löwenheim skolem theorem count countably infinite ultramatricial numerable noun lindelöf finite quantum logic adverbial number countable set universal sorter plural quantomania noncountable baire space lindelöf covering theorem mass noun quantity cantor bendixson theorem kurepa tree separable σ finite measure lindelöf space natural numbers universal packager plurale tantum maxitive σ algebra universal grinder number