Math. [CONTRA- 3.] See quot. 1853.
1853. Sylvester, in Phil. Trans., CXLIII. I. 543. Contravariant, a function which stands in the same relation to the primitive function from which it is derived as any of its linear transforms to an inversely derived transform of its primitive.
1885. Salmon, Higher Alg. (ed. 4), 121. Besides covariants and contravariants there are also functions involving both sets of variables, which differ, [etc.].
