plural of Donaldson-Thomas invariant

That does not vary over time.

(physics, mathematics) a feature of objects or laws that do not change if length scales (or energy scales) are multiplied by a common factor.

plural of invariant noun

(grammar) A noun in which number is not marked; that is, a noun which does not change form in the plural, such as, in English, fish and series.

(law) Something that must not be removed or modified during redistribution. / (mathematics) A section that will not vary through changing state.

plural of invariant section

(mathematics, relativity) A quantity that does not change due to a Lorentz transformation; a quantity that is independent of the inertial frame.

(computer science) an invariant that should be true on entry into a loop and is guaranteed to remain true on every iteration of the loop

(software engineering) An invariant used to constrain objects of a class that is preserved by class methods and that constrains the state stored in the object.