# NAG AD Librarye04td_a1w_f (handle_set_bound_a1w)

Note: a1w denotes that first order adjoints are computed in working precision; this has the corresponding argument type nagad_a1w_w_rtype. Also available is the t1w (first order tangent linear) mode, the interface of which is implied by replacing a1w by t1w throughout this document. Additionally, the p0w (passive interface, as alternative to the FL interface) mode is available and can be inferred by replacing of active types by the corresponding passive types. The method of codifying AD implementations in the routine name and corresponding argument types is described in the NAG AD Library Introduction.

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## 1Purpose

e04td_a1w_f is the adjoint version of the primal routine e04tdf.

## 2Specification

Fortran Interface
 Subroutine e04td_a1w_f ( ad_handle, handle, comp, idx, bli, bui, ifail)
 Integer, Intent (In) :: idx Integer, Intent (Inout) :: ifail Type (nagad_a1w_w_rtype), Intent (In) :: bli, bui Character (*), Intent (In) :: comp Type (c_ptr), Intent (Inout) :: ad_handle Type (c_ptr), Intent (In) :: handle
C++ Header Interface
#include <nagad.h>
 void e04td_a1w_f_ ( void *&ad_handle, void *handle, const char *comp, const Integer &idx, const nagad_a1w_w_rtype &bli, const nagad_a1w_w_rtype &bui, Integer &ifail, const Charlen length_comp)
The routine may be called by the names e04td_a1w_f or nagf_opt_handle_set_bound_a1w. The corresponding t1w and p0w variants of this routine are also available.

## 3Description

e04td_a1w_f is the adjoint version of the primal routine e04tdf.
e04tdf is a part of the NAG optimization modelling suite and sets or modifies the bounds of a single constraint, either the simple variable bounds, linear constraint or nonlinear constraint of the problem. It can be also used to fix any given variable. For further information see Section 3 in the documentation for e04tdf.

## 5Arguments

In addition to the arguments present in the interface of the primal routine, e04td_a1w_f includes some arguments specific to AD.
A brief summary of the AD specific arguments is given below. For the remainder, links are provided to the corresponding argument from the primal routine. A tooltip popup for all arguments can be found by hovering over the argument name in Section 2 and in this section.
1: ad_handle – Type (c_ptr) Input/Output
On entry: a handle to the AD configuration data object, as created by x10aa_a1w_f.
2: handle – Type(c_ptr) Input
3: comp – character Input
4: idx – Integer Input
5: Input
6: Input
7: ifail – Integer Input/Output

## 6Error Indicators and Warnings

e04td_a1w_f preserves all error codes from e04tdf and in addition can return:
${\mathbf{ifail}}=-89$
An unexpected AD error has been triggered by this routine. Please contact NAG.
See Section 4.8.2 in the NAG AD Library Introduction for further information.
${\mathbf{ifail}}=-899$
Dynamic memory allocation failed for AD.
See Section 4.8.1 in the NAG AD Library Introduction for further information.

Not applicable.

## 8Parallelism and Performance

e04td_a1w_f is not threaded in any implementation.

None.

## 10Example

See Section 10 in e04ta_a1w_f and e04tc_a1w_f.