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TRED(1) 										  TRED(1)

       tred - transitive reduction filter for directed graphs

       tred [ files ]

       tred computes the transitive reduction of directed graphs, and prints the resulting graphs
       to standard output.  This removes edges implied by transitivity.  Nodes and subgraphs  are
       not otherwise affected.	The ``meaning'' and validity of the reduced graphs is application
       dependent.  tred is particularly useful as a preprocessor to  dot  to  reduce  clutter  in
       dense layouts.

       Undirected graphs are silently ignored.

       The following operand is supported:

       files   Names  of files containing 1 or more graphs in dot format.  If no files operand is
	       specified, the standard input will be used.

       Using bitmaps internally would substantially decrease running time.

       If a graph has cycles, its transitive reduction is not uniquely	defined.   In  this  case
       tred emits a warning.

       Stephen C. North <north@research.att.com>
       Emden R. Gansner <erg@research.att.com>

       gc(1), dot(1), acyclic(1), gvpr(1), gvcolor(1), ccomps(1), sccmap(1), libgraph(3)

					  21 March 2001 				  TRED(1)
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