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<p>The interval domains that should be associated to the new intermediate variables are</p>

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<p><big> Propagation </big></p>
<p>The principle of the interval propagation is to call all available atomic contractors until no more contraction could be observed. </p>

<p>As a result of the <a href="page.php?w=Knaster-Tarski_theorem">Knaster-Tarski theorem</a>, the procedure always converges to intervals which enclose all feasible values for the variables.  A formalization of the interval propagation can be made thanks</p><p>
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