Some statistical problems related to singular spatial processes

G. Celant
In the literature upon the matter the problem of singularity is practically neglected. The explanation that generally is given to this omission is that singular processes are too "pathological". I think this is a rather partial point of view. So in the paper I have tried to illustrate this position briefly examinating (sometime sending back to an appropriate bibliography) the ways choosen to solve the problem (even if the solution is still hard to find,...