LTBOUNDLIBXC

TBOUNDLIBXC = .TRUE. | .FALSE.
Default: TBOUNDLIBXC = .FALSE. 

Description: TBOUNDLIBXC specifies wether or not the kinetic-energy density $\tau_{\sigma}$ is forced to be larger than the Weizsäcker $\tau_{\sigma}^{\textrm{W}}$

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For many functionals implemented in the library of exchange-correlation functionals Libxc it is possible to modify the parameters if one does not want to use the default values. If a functional from Libxc has parameters that can be modified, then they are listed in OUTCAR below "Parameters of Libxc functionals:" as P$n$ ($n=1, 2, ...$).