DSXT1
Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd..
November 2006
November 2006
Purpose
DSXT1 computes the difference between a set of eigenvalues.
The result is returned as the function value.
IJOB = 1: Computes max { min | D1(i)-D2(j) | }
i j
IJOB = 2: Computes max { min | D1(i)-D2(j) | /
i j
( ABSTOL + |D1(i)|*ULP ) }
The result is returned as the function value.
IJOB = 1: Computes max { min | D1(i)-D2(j) | }
i j
IJOB = 2: Computes max { min | D1(i)-D2(j) | /
i j
( ABSTOL + |D1(i)|*ULP ) }
Arguments
| ITYPE |
(input) INTEGER
Specifies the type of tests to be performed. (See above.)
|
| D1 |
(input) DOUBLE PRECISION array, dimension (N1)
The first array. D1 should be in increasing order, i.e.,
D1(j) <= D1(j+1). |
| N1 |
(input) INTEGER
The length of D1.
|
| D2 |
(input) DOUBLE PRECISION array, dimension (N2)
The second array. D2 should be in increasing order, i.e.,
D2(j) <= D2(j+1). |
| N2 |
(input) INTEGER
The length of D2.
|
| ABSTOL |
(input) DOUBLE PRECISION
The absolute tolerance, used as a measure of the error.
|
| ULP |
(input) DOUBLE PRECISION
Machine precision.
|
| UNFL |
(input) DOUBLE PRECISION
The smallest positive number whose reciprocal does not
overflow. |