next up previous contents
Next: Tests Performed on the Up: Testing the Symmetric Eigenvalue Previous: Test Matrices for the   Contents

Test Matrices for the Symmetric Eigenvalue Drivers

Eighteen different types of test matrices may be generated for the symmetric eigenvalue drivers. The first 15 test matrices are the same as the types of matrices used to test the symmetric eigenvalue computational routines, and are given in Table 8. Table 9 shows the types available, along with the numbers used to refer to the matrix types. Except as noted, all matrices have 124#124 entries. The expression 281#281 means a real diagonal matrix 282#282 with 124#124 entries conjugated by a unitary (or real orthogonal) matrix 132#132. The eigenvalue distributions have the same meanings as in the nonsymmetric case (see Section 5.2.1).

Table 9: Test matrices for the symmetric eigenvalue drivers
  Eigenvalue Distribution
Type Arithmetic Geometric Clustered Other
Zero   1
Identity   2
Diagonal 3 4, 626#26, 7126#126 5  
281#281 8, 1126#26, 12126#126 9 10  
Symmetric w/Random entries   13, 1426#26, 15126#126
Band       16, 1726#26, 18126#126
26#26- matrix entries are 129#129
126#126- matrix entries are 130#130



next up previous contents
Next: Tests Performed on the Up: Testing the Symmetric Eigenvalue Previous: Test Matrices for the   Contents
Susan Blackford 2001-08-13