convexifier

Convexifier is a narrow technical verb from mathematics and optimization theory, meaning to make a function or set convex — for example by taking its convex hull. It's confined almost entirely to academic and engineering writing.

• On convexifie la fonction avant d'appliquer l'algorithme. — The function is made convex before applying the algorithm.
• Cette méthode convexifie le problème d'optimisation. — This method convexifies the optimization problem.
• Les chercheurs ont convexifié l'ensemble des contraintes. — The researchers convexified the set of constraints.

This is specialist mathematical vocabulary a learner will only meet in technical or academic French — it has no everyday use worth practicing outside that context.