invariant

Noun
  1. A feature (quantity or property or function) that remains unchanged when a particular transformation is applied to it (synset 105858959)
    referred to in: math, mathematics, maths - a science (or group of related sciences) dealing with the logic of quantity and shape and arrangement
    is a type of: characteristic, feature - a prominent attribute or aspect of something
Adjective
  1. Unaffected by a designated operation or transformation (synset 302516453)
    referred to in: math, mathematics, maths - a science (or group of related sciences) dealing with the logic of quantity and shape and arrangement
    similar to: invariable - not liable to or capable of change
  2. Unvarying in nature (synset 302516074)
    "maintained a constant temperature"; "principles of unvarying validity"
    similar to: invariable - not liable to or capable of change
    same as: changeless, constant, unvarying

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