---
name: "dget36.f"
section: "3"
platform: "linux"
package: "lapack-doc"
version: "3.12.1-2"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/dget36.f"
---

# dget36.f(3)

## NAME

TESTING/EIG/dget36.f

## SYNOPSIS

### Functions/Subroutines

subroutine **dget36** (rmax, lmax, ninfo, knt, nin)\
 **DGET36**

## Function/Subroutine Documentation

### subroutine dget36 (double precision rmax, integer lmax, integer, dimension( 3 ) ninfo, integer knt, integer nin)

**DGET36**

**Purpose:**

```
!>
!> DGET36 tests DTREXC, a routine for moving blocks (either 1 by 1 or
!> 2 by 2) on the diagonal of a matrix in real Schur form.  Thus, DLAEXC
!> computes an orthogonal matrix Q such that
!>
!>    Q' * T1 * Q  = T2
!>
!> and where one of the diagonal blocks of T1 (the one at row IFST) has
!> been moved to position ILST.
!>
!> The test code verifies that the residual Q'*T1*Q-T2 is small, that T2
!> is in Schur form, and that the final position of the IFST block is
!> ILST (within +-1).
!>
!> The test matrices are read from a file with logical unit number NIN.
!>
```

**Parameters**

*RMAX*

```
!>          RMAX is DOUBLE PRECISION
!>          Value of the largest test ratio.
!>
```

*LMAX*

```
!>          LMAX is INTEGER
!>          Example number where largest test ratio achieved.
!>
```

*NINFO*

```
!>          NINFO is INTEGER array, dimension (3)
!>          NINFO(J) is the number of examples where INFO=J.
!>
```

*KNT*

```
!>          KNT is INTEGER
!>          Total number of examples tested.
!>
```

*NIN*

```
!>          NIN is INTEGER
!>          Input logical unit number.
!>
```

**Author**

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line **87** of file **dget36.f**.

## Author

Generated automatically by Doxygen for LAPACK from the source code.