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    <h1>Make stoichiometry Matrix For a Petri Net</h1>
    
    <div class="hidden name"><code>spn_S.Rd</code></div>
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    <p>Generate the stoichiometry (|u| by |v|) matrix for the SPN.
Each column gives the net effect of that transition firing upon the state
space of the model. Internally, this creates a Pre (<code><a href='spn_Pre.html'>spn_Pre</a></code>) and
Post (<code>