Invariant

[ɪn'veərɪənt] or [ɪn'vɛrɪənt]

解释:

(noun.) a feature (quantity or property or function) that remains unchanged when a particular transformation is applied to it.

(adj.) unaffected by a designated operation or transformation .

编辑:韦斯利--From WordNet

解释:

(n.) An invariable quantity; specifically, a function of the coefficients of one or more forms, which remains unaltered, when these undergo suitable linear transformations.

整理:彼得