Quasiconvexity (calculus of variations)

Quasiconvexity is a concept that arises in the context of the calculus of variations and optimization, particularly when dealing with variational problems that involve integral functionals. While convexity is a well-understood property that applies to functions from \(\mathbb{R}^n\) to \(\mathbb{R}\), quasiconvexity generalizes this idea and plays a significant role in ensuring certain properties for minimization problems.