We consider two types of pattern avoidance in the rook monoid, i.e. the set of 0–1 square matrices with at most one nonzero entry in each row and each column. For one-dimensional rook patterns, we completely characterize monoid elements avoiding a single pattern of length at most three and develop an enumeration scheme algorithm to study rook placements avoiding sets of patterns.

In the last years, the patterns community grew at a very fast pace. A lot of pattern languages and pattern systems emerged. Some of them are very popular, some of them are not. The patterns in each pattern language are described using different templates and the samples are written using different programming languages. This produces a considerable impedance mismatch among all of them. Currentl...

Background. Epidermolisys bullosa pruriginosa is a rare pattern of dystrophic epidermolisys and characterized by severe itching that accompanies the formation papules, plaques nodes primarily on lower limbs skin imitating prurigo nodularis. Nowadays, less than 100 cases this disease are reported in world, thus, presentation clinical case relevant. Clinical description . The authors describe pru...