  The models of endofullerenes C60 and C82 with silver atom or diatomic silver
are calculated with ab initio SCF Hartree-Fock methods including the full
geometry optimization. Ag@C60 is a bound system with positive binding energy
while Ag2@C60 is not because strong geometrical strain. Silver atom is located
at some distance from the cage center in the lower-energy model, and the
structure reduces the symmetry. The endo-structures with the C82 cage can exist
with both mono- and diatomic silver. Electronic charge transfer in all
structures occurs from the carbon cage to silver.
