The Aronsson Equation for Absolute Minimizers of Supremal Functionals in Carnot-Carathéodory Spaces

Given a $C^2$ family of vector fields $X_1,...,X_m$ which induces a continuous Carnot-Carathéodory distance, we show that any absolute minimizer of a supremal functional defined by a $C^2$ quasiconvex Hamiltonian $f(x, z, p)$, allowing $z$-variable dependence, is a viscosity solution to the Aronsson equation $-\langle X(f(x, u(x), Xu(x))), D_p f(x, u(x), Xu(x))\rangle = 0.$

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