Mesh matrix(planar network) +1 when branch b; is in mesh mk and their orientations coincides M=mkj k 1 when branch b is in mesh mk and their orientations do not coincide. 0 when branch bi is not in mesh mkMesh matrix(planar network)   M = mkj • . j mesh mk when branch b is not in          − + = 0 1 1 mkj and their orientations coincide; when branch bj i s i n mesh mk and their orientations do not coincide; when branch b j i s i n mesh mk