  In this paper, we describe and study a mathematical framework for
cryo-elecron microscopy. The main result, is a a proof of the admissability
(correctness) and the numerical stability of the intrinsic reconstitution
algorithm which was introduced by Singer and Shkolnisky in [7]. In addition, we
explain how the various numerical observations reported in that work, follow
from basic representation theoretic principles.

Representation Theory