# MINMAX or MAXMIN

Subcase Information Entry The MINMAX or MAXMIN commands can be used to select normalized response or system identification definitions as the objective function for a "Minmax" or "Maxmin" optimization.

## Format

MINMAX = `integer`

MAXMIN = `integer`

## Definitions

## Comments

- Multiple MINMAX entries are allowed and multiple MAXMIN entries are allowed, but a MAXMIN entry cannot appear in the same input file as a MINMAX entry.
- The multiple MINMAX or MAXMIN entries define the same optimization problem.
- Refer to Minmax Objective Function in the User Guide for more information on "Minmax" optimization.
- If the DSYSID entry is
referenced by a MINMAX or a MAXMIN Subcase
Information Entry, the beta method is applied in the optimization as:
Minimize $\beta $ with
(1) $${W}_{i}\left|\frac{{R}_{i}^{\mathit{FE}}-{R}_{i}^{T}}{{R}_{i}^{T}}\right|\le \beta $$ - This entry is represented as an optimization objective in HyperMesh.