On 2/8/2013 2:41 AM, WM wrote: > > Standard terminology is that X is countable iff X is listable.
Please cite a source for "listable"
I certainly am curious. A wikipedia search on "listable" and "listable mathematics" turns up little that is of use whereas "countable" and "countable mathematics" turns up many recognizable definitions.
Your use of the word "countable" is gibberish, so the statement above is useless without some independent source for "listable".