# ssxt1.f - Man Page

TESTING/EIG/ssxt1.f

## Synopsis

### Functions/Subroutines

real function ssxt1 (ijob, d1, n1, d2, n2, abstol, ulp, unfl)
SSXT1

## Function/Subroutine Documentation

### real function ssxt1 (integer ijob, real, dimension( * ) d1, integer n1, real, dimension( * ) d2, integer n2, real abstol, real ulp, real unfl)

SSXT1

Purpose:

``` SSXT1  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 ) }```
Parameters

IJOB

```          IJOB is INTEGER
Specifies the type of tests to be performed.  (See above.)```

D1

```          D1 is REAL array, dimension (N1)
The first array.  D1 should be in increasing order, i.e.,
D1(j) <= D1(j+1).```

N1

```          N1 is INTEGER
The length of D1.```

D2

```          D2 is REAL array, dimension (N2)
The second array.  D2 should be in increasing order, i.e.,
D2(j) <= D2(j+1).```

N2

```          N2 is INTEGER
The length of D2.```

ABSTOL

```          ABSTOL is REAL
The absolute tolerance, used as a measure of the error.```

ULP

```          ULP is REAL
Machine precision.```

UNFL

```          UNFL is REAL
The smallest positive number whose reciprocal does not
overflow.```
Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line 104 of file ssxt1.f.

## Author

Generated automatically by Doxygen for LAPACK from the source code.

## Referenced By

The man page ssxt1(3) is an alias of ssxt1.f(3).

Tue Nov 28 2023 12:08:42 Version 3.12.0 LAPACK