A two-dimensional word is a function on Z2 with finite number of values. The main problem we are interested in is periodicity of twodimensional words satisfying some local conditi...
A large class of q-distributions is defined on the stochastic model of Bernoulli trials in which the probability of success (=advancing to the next level) depends geometrically on...
Using the fact that the Parikh matrix mapping is not an injective mapping, the paper investigates some properties of the set of words with the same Parikh matrix; these words are ...
Motif patterns consisting of sequences of intermixed solid and don't care characters have been introduced and studied in connection with pattern discovery problems of computa...
We introduce the model of Markov nets, a probabilistic extension of safe Petri nets under the true-concurrency semantics--this means that traces, not firing sequences, are given a...
We introduce a new combinatorial game between two players: Magnus and Derek. Initially, a token is placed at position 0 on a round table with n positions. In each round of the gam...