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<h3 class="section">9.3 Specify structure-based linear constraints</h3>
<p><a name="index-structure_002dbased-linear-constraints-99"></a>
Linear constraints, otherwise specified with a matrix and a vector<!-- (@xref{}) -->
, can be adapted to structure-based parameter handling by specifying,
instead of a matrix, a structure containing the rows of the matrix in
fields under the respective parameter names. In this case, rows
containing only zeros need not be given.
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