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<div class="subTitle">org.jgrapht.alg</div>
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<h2 title="Class ChromaticNumber" class="title">Class ChromaticNumber</h2>
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<pre>public abstract class <span class="strong">ChromaticNumber</span>
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extends <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre>
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<div class="block">Allows the <a href="http://mathworld.wolfram.com/ChromaticNumber.html">
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chromatic number</a> of a graph to be calculated. This is the minimal number
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of colors needed to color each vertex such that no two adjacent vertices
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share the same color. This algorithm will not find the true chromatic number,
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since this is an NP-complete problem. So, a greedy algorithm will find an
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approximate chromatic number.</div>
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<dl><dt><span class="strong">Since:</span></dt>
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<dd>Dec 21, 2008</dd>
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<dt><span class="strong">Author:</span></dt>
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<dd>Andrew Newell</dd></dl>
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<td class="colOne"><code><strong><a href="../../../org/jgrapht/alg/ChromaticNumber.html#ChromaticNumber()">ChromaticNumber</a></strong>()</code> </td>
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<td class="colFirst"><code>static <V,E> int</code></td>
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<td class="colLast"><code><strong><a href="../../../org/jgrapht/alg/ChromaticNumber.html#findGreedyChromaticNumber(org.jgrapht.UndirectedGraph)">findGreedyChromaticNumber</a></strong>(<a href="../../../org/jgrapht/UndirectedGraph.html" title="interface in org.jgrapht">UndirectedGraph</a><V,E> g)</code>
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<div class="block">Finds the number of colors required for a greedy coloring of the graph.</div>
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<td class="colFirst"><code>static <V,E> <a href="http://docs.oracle.com/javase/7/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a><<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a>,<a href="http://docs.oracle.com/javase/7/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a><V>></code></td>
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<td class="colLast"><code><strong><a href="../../../org/jgrapht/alg/ChromaticNumber.html#findGreedyColoredGroups(org.jgrapht.UndirectedGraph)">findGreedyColoredGroups</a></strong>(<a href="../../../org/jgrapht/UndirectedGraph.html" title="interface in org.jgrapht">UndirectedGraph</a><V,E> g)</code>
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<div class="block">Finds a greedy coloring of the graph.</div>
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<a name="ChromaticNumber()">
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<h4>ChromaticNumber</h4>
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<pre>public ChromaticNumber()</pre>
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<a name="findGreedyChromaticNumber(org.jgrapht.UndirectedGraph)">
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<h4>findGreedyChromaticNumber</h4>
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<pre>public static <V,E> int findGreedyChromaticNumber(<a href="../../../org/jgrapht/UndirectedGraph.html" title="interface in org.jgrapht">UndirectedGraph</a><V,E> g)</pre>
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<div class="block">Finds the number of colors required for a greedy coloring of the graph.</div>
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<dl><dt><span class="strong">Parameters:</span></dt><dd><code>g</code> - an undirected graph to find the chromatic number of</dd>
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<dt><span class="strong">Returns:</span></dt><dd>integer the approximate chromatic number from the greedy
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algorithm</dd></dl>
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<h4>findGreedyColoredGroups</h4>
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<pre>public static <V,E> <a href="http://docs.oracle.com/javase/7/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a><<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a>,<a href="http://docs.oracle.com/javase/7/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a><V>> findGreedyColoredGroups(<a href="../../../org/jgrapht/UndirectedGraph.html" title="interface in org.jgrapht">UndirectedGraph</a><V,E> g)</pre>
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<div class="block">Finds a greedy coloring of the graph.</div>
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<dl><dt><span class="strong">Parameters:</span></dt><dd><code>g</code> - an undirected graph for which to find the coloring</dd></dl>
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