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TRED(1) DragonFly General Commands Manual TRED(1)## NAME

tred - transitive reduction filter for directed graphs## SYNOPSIS

tred[files]## DESCRIPTION

tredcomputes 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.tredis particularly useful as a preprocessor todotto reduce clutter in dense layouts. Undirected graphs are silently ignored.## OPERANDS

The following operand is supported:filesNames of files containing 1 or more graphs in dot format. If nofilesoperand is specified, the standard input will be used.## BUGS

Using bitmaps internally would substantially decrease running time.## DIAGNOSTICS

If a graph has cycles, its transitive reduction is not uniquely defined. In this casetredemits a warning.## AUTHORS

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

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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