An equation of state {\em \`a la} Carnahan-Starling for a   five-dimensional fluid of hard hyperspheres
  The equation of state for five-dimensional hard hyperspheres arising as a weighted average of the Percus-Yevick compressibility (3/5) and virial (2/5) equations of state is considered. This Carnahan-Starling-like equation turns out to be extremely accurate, despite the fact that both Percus-Yevick equations of state are rather poor. 
A. Santos