Monika Molnarowa
                (Technical University, Koszyce)
 
 
 
  Periodicity of matrices in max-plus algebra
 
Periodicity of matrices in max-plus algebra is studied. A necessary and sufficient condition is found for a given matrix to be almost periodic. The period of a matrix is shown to be the least common multiple of the high periods of all non-trivial highly connected components in the corresponding digraph of A. A polynomial algorithm for computing the exact value of the matrix period for a given matrix is described.  
 
 
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