How to Say "invariant" in Spanish
The Spanish word for “invariant” is “constante” — B2 level.
English → SpanishB2
NounB2formal
something that does not change

Examples
La velocidad de la luz es una constante física fundamental.
The speed of light is a fundamental physical constant.
Calculamos la constante de proporcionalidad en la fórmula.
We calculated the constant of proportionality in the formula.
Always Feminine
When used as a noun meaning a fixed value in math or science, 'constante' is always feminine: 'la constante'.
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