star - maxplus star
Solve x=Ax+Id in the maxplus algebra. When there is no circuits with positive weight in G(A) (the incidence graph of A) B=Id+A+.....A^(n-1) where n denotes the order of the square matrix A.
star(#(1)) star(#(-1)) star(#([1,2;3,4])) a=#([-3,-2;-1,0]); b=star(a) b==%eye(2,2)+a b==b+a*a
plus, karp, howard, semihoward, maxplus,