Unaffected by a specified operation (especially by a transformation).
An invariant quantity, function etc.
persistent in occurrence and unvarying in nature; "maintained a constant temperature"; "a constant beat"; "principles of unvarying validity"; "a steady breeze"
(mathematics) unaffected by a designated operation or transformation
unaffected by a designated operation or transformation
a feature (quantity or property or function) that remains unchanged when a particular transformation is applied to it