---
name: "zget35.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/zget35.f"
---

# zget35.f(3)

## NAME

TESTING/EIG/zget35.f

## SYNOPSIS

### Functions/Subroutines

subroutine **zget35** (rmax, lmax, ninfo, knt, nin)\
 **ZGET35**

## Function/Subroutine Documentation

### subroutine zget35 (double precision rmax, integer lmax, integer ninfo, integer knt, integer nin)

**ZGET35**

**Purpose:**

```
!>
!> ZGET35 tests ZTRSYL, a routine for solving the Sylvester matrix
!> equation
!>
!>    op(A)*X + ISGN*X*op(B) = scale*C,
!>
!> A and B are assumed to be in Schur canonical form, op() represents an
!> optional transpose, and ISGN can be -1 or +1.  Scale is an output
!> less than or equal to 1, chosen to avoid overflow in X.
!>
!> The test code verifies that the following residual is order 1:
!>
!>    norm(op(A)*X + ISGN*X*op(B) - scale*C) /
!>        (EPS*max(norm(A),norm(B))*norm(X))
!>
```

**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
!>          Number of examples where INFO is nonzero.
!>
```

*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 **83** of file **zget35.f**.

## Author

Generated automatically by Doxygen for LAPACK from the source code.