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| an expression or a proposition, often algebraic, asserting the equality of two quantities |
| an average, especially the arithmetic average |
| invariant (ɪnˈvɛərɪənt) | |
| —n | |
| 1. | maths an entity, quantity, etc, that is unaltered by a particular transformation of coordinates: a point in space, rather than its coordinates, is an invariant |
| —adj | |
| 2. | maths (of a relationship or a property of a function, configuration, or equation) unaltered by a particular transformation of coordinates |
| 3. | a rare word for invariable |
| in'variance | |
| —n | |
| in'variancy | |
| —n | |