A counterexample to the monotone increasing behavior of an Alt-Caffarelli-Friedman formula in the Heisenberg group. (English) Zbl 1532.35469
Atti Accad. Naz. Lincei, Cl. Sci. Fis. Mat. Nat., IX. Ser., Rend. Lincei, Mat. Appl. 34, No. 2, 295-306 (2023).