On a degenerate problem in the calculus of variations

Guy Bouchitté, Pierre Bousquet
2018 Transactions of the American Mathematical Society  
We establish the uniqueness of the solutions for a degenerate scalar problem in the multiple integrals calculus of variations. The proof requires as a preliminary step the study of the regularity properties of the solutions and of their level sets. We exploit the uniqueness and the regularity results to explore some of their qualitative properties. In particular, we emphasize the link between the supports of the solutions and the Cheeger problem.
doi:10.1090/tran/7570 fatcat:f4emfcd4efhkjlgjv4hanukdxi