B.1.7 I6LMDA

 For the a matrix computed in 15CMAT, I6LMDA computes the

eigenvalues using Scientific Subroutine Package subprograms HSBG and

ATEI6. The largest eigenvalue in magnitude is then found.

B.1.8 I7MPSP

 The subprogram I7MPSP proposes modifications to solution

procedures by re-ordering the functions and variables in the FVIM and

specifying that certain of them belong to Newton-Raphson solution

procedures and others to Gauss-Seidel solution procedures. The

functions and variables to be included in a Newton-Raphson partition

are determined from an examination of the modified Jacobian (coefficient

matrix). Non-output elements which are much larger than the output

terms in their row and column are found. The function type containing

these terms is moved to the Newton-Raphson partition, along with the

variable type if it is a legal output; otherwise another variable type

which is a legal output is moved. Only elements which are a certain

percent of the largest element (user specified) are treated in this

manner.


B.2 Level 2 Subprograms

B.2.1 J1FIX

STOSIM (3.2), J1CTWE (5.2), RSTSIM (5.11), WRTDIR (6.2)

 J1FIX is invoked by ALWET when a variable proposed as a torn

 variable is found to be a two-way edge complement of a variable which

 was torn because of that two-way edge. The SIM, as it existed when

 the tear decision for the two-way edge was made, is restored using

 RSTSIM. The two-way edge links are traced using the subprogram