1) исчислимый 2) перечислимый 3) счётный Например: at most countable — не более чем счётный
прилагательное исчислимый, исчисляемый Синоним(ы): calculable, computable
adjective capable of being counted; especially capable of being put into one-to-one correspondence with the positive integers Example: a countable set • countability noun • countably adverb
A term describing a set which is isomorphic to a subet of the natural numbers. A countable set has "countably many" elements. If the isomorphism is stated explicitly then the set is called "a counted set" or "an enumeration". Examples of countable sets are any finite set, the natural numbers, integers, and rational numbers. The real numbers and complex numbers are not.