-- In*va"ri*a*ble*ness, n. -- In*va"ri*a*bly, adv.
In*va"ri*a*ble (?), n. (Math.) An invariable quantity; a constant.
In*va"ri*ance (?), n. (Math.) The property of remaining invariable
under prescribed or implied conditions. J. J. Sylvester.
In*va"ri*ant (?), n. (Math.) An invariable quantity; specifically, a
function of the coefficients of one or more forms, which remains
unaltered, when these undergo suitable linear transformations. J. J.
Sylvester.