  Dynamical quantities such as the diffusion coefficient and relaxation times
for some glass-formers may depend on density and temperature through a specific
combination, rather than independently, allowing the representation of data
over ranges of density and temperature as a function of a single scaling
variable. Such a scaling, referred to as density - temperature (DT) scaling, is
exact for liquids with inverse power law (IPL) interactions but has also been
found to be approximately valid in many non-IPL liquids. We have analyzed the
consequences of DT scaling on the density dependence of the fragility in a
model glass-former. We find the density dependence of kinetic fragility to be
weak, and show that it can be understood in terms of DT scaling and deviations
of DT scaling at low densities. We also show that the Adam-Gibbs relation
exhibits DT scaling and the scaling exponent computed from the density
dependence of the activation free energy in the Adam-Gibbs relation, is
consistent with the exponent values obtained by other means.
