van Enter A.C.D., Fern\'andez R., Koteck\'y R.
Pathological Behavior of Renormalization-Group Maps
at High Fields and Above the Transition Temperature,
(83K, LaTeX)

ABSTRACT.  We show that decimation transformations applied to high-$q$ Potts
models result in non-Gibbsian measures even for temperatures higher
than the transition temperature.  We also show that majority
transformations applied to the Ising model in a very strong field at
low temperatures produce non-Gibbsian measures.  This shows that
pathological behavior of renormalization-group transformations is even
more widespread than previous examples already suggested.