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| author | Daniel Wolff |
|---|---|
| date | Fri, 19 Aug 2016 13:07:06 +0200 |
| parents | |
| children |
| rev | line source |
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| Daniel@0 | 1 .TH TRED 1 "21 March 2001" |
| Daniel@0 | 2 .SH NAME |
| Daniel@0 | 3 tred \- transitive reduction filter for directed graphs |
| Daniel@0 | 4 .SH SYNOPSIS |
| Daniel@0 | 5 .B tred |
| Daniel@0 | 6 [ |
| Daniel@0 | 7 .I files |
| Daniel@0 | 8 ] |
| Daniel@0 | 9 .SH DESCRIPTION |
| Daniel@0 | 10 .B tred |
| Daniel@0 | 11 computes the transitive reduction of directed graphs, |
| Daniel@0 | 12 and prints the resulting graphs to standard output. |
| Daniel@0 | 13 This removes edges implied by transitivity. |
| Daniel@0 | 14 Nodes and subgraphs are not otherwise affected. |
| Daniel@0 | 15 The ``meaning'' and validity of the reduced graphs |
| Daniel@0 | 16 is application dependent. |
| Daniel@0 | 17 .B tred |
| Daniel@0 | 18 is particularly useful as a preprocessor to |
| Daniel@0 | 19 .I dot |
| Daniel@0 | 20 to reduce clutter in dense layouts. |
| Daniel@0 | 21 .PP |
| Daniel@0 | 22 Undirected graphs are silently ignored. |
| Daniel@0 | 23 .SH OPERANDS |
| Daniel@0 | 24 The following operand is supported: |
| Daniel@0 | 25 .TP 8 |
| Daniel@0 | 26 .I files |
| Daniel@0 | 27 Names of files containing 1 or more graphs in dot format. |
| Daniel@0 | 28 If no |
| Daniel@0 | 29 .I files |
| Daniel@0 | 30 operand is specified, |
| Daniel@0 | 31 the standard input will be used. |
| Daniel@0 | 32 .SH "BUGS" |
| Daniel@0 | 33 Using bitmaps internally would substantially decrease running time. |
| Daniel@0 | 34 .SH "DIAGNOSTICS" |
| Daniel@0 | 35 If a graph has cycles, its transitive reduction is not uniquely defined. |
| Daniel@0 | 36 In this case \fItred\fP emits a warning. |
| Daniel@0 | 37 .SH AUTHORS |
| Daniel@0 | 38 Stephen C. North <north@research.att.com> |
| Daniel@0 | 39 .br |
| Daniel@0 | 40 Emden R. Gansner <erg@research.att.com> |
| Daniel@0 | 41 .SH "SEE ALSO" |
| Daniel@0 | 42 gc(1), dot(1), acyclic(1), gvpr(1), gvcolor(1), ccomps(1), sccmap(1), libgraph(3) |