Wiktionary
column space
n. (context mathematics English) The vector space comprising all the column vectors of a matrix
Usage examples of "column space".
That being the case, I'm not interested in taking up column space with reviews of bad books.
Casey Stonehart warranted very little in the way of column space beyond the occasional query as to his whereabouts.
Having reviewed three of his books in the past year, I felt I should devote my limited column space to some other writers.