It is conjectured that space-time and momentum space may be both confo
rmally compactified and correlated by conformal inversion, rendering a
priori impossible the empirical realization of the concept of both in
finity and infinitesimal. It appears that in such a world momentum spa
ce is appropriate for the description of quantum mechanics in spinoria
l form. An exactly soluble, two-dimensional model is presented and dis
cussed.