and transformation entry counts. A "poor column" is a column for which
all the possible pivot entries are below the pivot tolerance. This means
that an inverse for the current basis cannot be produced with confidence
for computational reasons. Therefore, all such columns are removed from
the basis before proceeding.
 After the first inversion, a message indicating feasibility is
printed and the iteration at which feasibility was reached is printed
also.
 The next inversion message is the result of extending the basis after
feasibility as mentioned above. Following this is a "row error" message
which indicates the amount by which the constraints fail to satisfy exact
equality. This is printed automatically after feasibility, optimality or
unboundedness is reached. The user can order this to be printed at certain
points with the use of the ERRORS control card (see section 7).
 In addition to error messages and messages regarding optimality, etc.
there are three other major types of printed output: Short Output, Row
Output, and Primal-Dual Variable Solution Output. These are controlled
by the user with the PRMODE control card described in Section 7. At this
point, we will describe and interpret them with reference to Sample
Problem Number 1.


5.2 Short Output


 The Short Output consists of the four lines printed below the "optimal
solution" message on the initial page of Figure 3. The (3) is the output
condition which caused this output to be printed. The meaning of this is
explained in the PRMODE discussion also. The next two names, "MATRIX"
and "RHS", are the names for the current matrix and right hand side. They
are problem identification parameters that can be set by the user by
including the desired identifiers in columns 1 to 6 of the card preceding
MATRIX and/or RHS. The names in Figure 3 are the default names.
 The rest of the line contains the following information:
 --current iteration count
 --number of pivots performed
 --number of infeasibilities
 --the determinant of the matrix formed by the basis vectors