This program computes up to the sixth virial coefficient for hard spheres in a reasonable time. For information about the virial series and statistical mechanics, please see

1. H. D. Ursell, Proc. Cambridge Phil. Soc. 23, 685 (1927).- First introduction of the virial expansion
2. J. Mayer, J. Chem. Phys. 5, 67 (1937).- Development of the theory and introduction of the famous Mayer graphs.
3. F.H. Ree and W.G. Hoover, J. Chem. Phys 40, 939 (1964), J. Chem. Phys. 41, 1635 (1964).- Reduction of the number of Mayer integrals neccesary to cumpute each virial coefficient.
4. Any good manual about equilibrium statistical mechanics, such as R. Balescu, Equlibrium and nonequilibrium statistical mechanics, John Wiley & Sons or Hansen & McDonalds, Theory of simple liquids, Addison-Wesley, Cambridge, Mass., 1996.

• Source code of the program. It has been tested on the GNU C compiler for Linux, as well as in the DOS port DJGPP. Probably, it may compile in any platform wich has the GNU C compiler ported.
• Linux ELF 32-bit LSB executable.
• DOS Executable.