P-ADIC CONFORMAL-INVARIANCE AND THE BRUHAT-TITS TREE

It is shown that some Gaussian and non-Gaussian scaling invariant p-adic field theories are invariant under the group of transformations which conserve the p-adic norm of the cross-ratio of any four points. This group can be treated as a p-adic conformal group. It has a continuation on the Bruhat-Tits tree, being an automorphism group of that three. The models also have three continuation, in particular the binary correlation function of the tree model is a spherical function.