Having row-equivalence

(linear algebra) A relation between two matrices of the same size, such that every row of one matrix is a linear combination of the rows of the other matrix, and vice versa. It is an equivalence relation.

In an equitable manner

The condition of being equable.

An officer responsible for the care and supervision of the horses of a person of rank. / (Britain) A personal attendant to a head of state, a member of a royal family, or a national representative.

autumnal equinox

(astronomy) vernal equinox

(idiomatic, ironic) Ostensibly equal, but in reality more privileged.

(archaic) A court empowered to provide only equitable relief, but not to make rulings on questions of law, nor to award monetary damages.

(physics) A relativistic wave equation that describes an electron (and similar particles); it predicted the existence of antiparticles