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Libxc is a library of exchange-correlation functionals for density-functional theory. In Libxc you can find different types of functionals: LDA, GGA, hybrids, and mGGA (experimental). These functionals depend on local information, in the sense that the value of the potential at a given point depends only on the values of the density -- and the gradient of the density and the kinetic energy density, for the GGA and mGGA cases -- at a given point.