This set of functions is defined by several of the Hibridon input parameters, as follows:
R2: largest value of Rm
SPAC: spacing between successive values of Rm
C: parameter which determines the exponential scale factor of the distributed
Gaussian functions, with
EIGMIN: lower limit on the minimum allowed eigenvalue of the overlap matrix. If the minimum eigeinvalue is less than this value, the parameter C should be increased.
DELR, DR: The matrix elements of W(R) are evaluated by a Simpson's rule integration extending from R1 - DELR to R2 + DELR in steps of DR.
C: 0.5
EIGMIN: 1.e-6
DELR: 1
DR: 0.1