1,
                              'a' for NR(1).NR(2) = 4.2, and
                              'mu' for NR(1).NR(2) = 4.3.
          DPAR(2)           : defines parameters
                              'r' for NR(1).NR(2) = 4.1,
                              'b' for NR(1).NR(2) = 4.2, and
                              'delta' for NR(1).NR(2) = 4.3.
          DPAR(3)           : defines parameters
                              'c' for NR(1).NR(2) = 4.2 and
                              'kappa' for NR(1).NR(2)