# 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