fact: Definition eval A: regex := mx_to_scal (initial A * delta A # * final A).
imports: ATBR(Common) ATBR(Classes) ATBR(Graph) ATBR(Monoid) ATBR(SemiLattice) ATBR(SemiRing) ATBR(KleeneAlgebra) ATBR(MxGraph) ATBR(MxSemiLattice) ATBR(MxSemiRing) ATBR(MxKleeneAlgebra) ATBR(MyFSets) ATBR(MyFSetProperties) ATBR(MyFMapProperties)