ZCHKEC tests eigen- condition estimation routines
        ZTRSYL, CTREXC, CTRSNA, CTRSEN
 In all cases, the routine runs through a fixed set of numerical
 examples, subjects them to various tests, and compares the test
 results to a threshold THRESH. In addition, ZTRSNA and CTRSEN are
 tested by reading in precomputed examples from a file (on input unit
 NIN).  Output is written to output unit NOUT.

THRESH

          THRESH is DOUBLE PRECISION
          Threshold for residual tests.  A computed test ratio passes
          the threshold if it is less than THRESH.

TSTERR

          TSTERR is LOGICAL
          Flag that indicates whether error exits are to be tested.

NIN

          NIN is INTEGER
          The logical unit number for input.

NOUT

          NOUT is INTEGER
          The logical unit number for output.

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

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