# Directory `support/graphbase`

README

The Stanford GraphBase is copyright 1992 by Stanford University These files may be freely copied and distributed, provided that no changes whatsoever are made. All users are asked to help keep the Stanford GraphBase sources consistent and ``uncorrupted,'' identical everywhere in the world. Changes are permissible only if the changed file is given a new name, different from the names of existing files listed below, and only if the changed file is clearly identified as not being part of the Stanford GraphBase. The author has tried his best to produce correct and useful programs, in order to help promote computer science research, but no warranty of any kind should be assumed. FILES INCLUDED IN STANDARD GRAPHBASE DISTRIBUTION The standard Stanford GraphBase consists of the following files: 1) Data files anna.dat Anna Karenina (used by gb_books) david.dat David Copperfield (used by gb_books) econ.dat US economic input and output (used by gb_econ) games.dat College football scores, 1990 (used by gb_games) homer.dat The Iliad (used by gb_books) huck.dat Huckleberry Finn (used by gb_books) jean.dat Les Miserables (used by gb_books) miles.dat Mileage between North American cities (used by gb_miles) mona.dat Mona Lisa pixels (used by gb_mona) roget.dat Cross references in Roget's Thesaurus (used by gb_roget) words.dat Five-letter words of English (used by (gb_words) 2) CWEB program files a) Kernel routines gb_flip.w System-independent random number generator gb_graph.w Data structures for graphs gb_io.w Input/output routines gb_sort.w Sorting routine for linked lists b) Graph generating routines gb_basic.w Standard building blocks and graph operations gb_books.w Graphs based on world literature gb_econ.w Graphs based on US inter-industry flow gb_games.w Graphs based on college football games gb_gates.w Graphs based on combinational logic gb_miles.w Graphs based on highway distances gb_mona.w Graphs based on Leonardo's Mona Lisa gb_plane.w Planar graphs gb_raman.w Ramanujan graphs (expanders) gb_rand.w Random graphs gb_roget.w Graphs based on Roget's Thesaurus gb_words.w Graphs based on 5-letter words of English c) Demonstration routines assign_mona.w The assignment problem, using Mona Lisa book_components.w Biconnected components, using the plots of books econ_order.w Heuristic solution to an optimum permutation problem football.w Heuristic solution to a longest-path problem girth.w Empirical study of Ramanujan graphs ladders.w Shortest paths in word graphs miles_span.w Comparison of algorithms for minimum spanning tree multiply.w Using a parallel multiplication circuit queen.w Graphs based on queen moves roget_components.w Strong components of a directed graph take_risc.w Using a simple RISC computer circuit word_components.w Connected components of word graphs d) Miscellaneous routines boilerplate.w Legalese incorporated into all GraphBase programs gb_dijk.w Variants of Dijkstra's algorithm for shortest paths gb_save.w Converting graphs to ASCII files and vice versa test_sample.w Test routine for GraphBase installation 3) Miscellaneous files Makefile Instructions to build everything with UNIX README What you're now reading abstract.plaintex Short explanation of what it's all about cities.texmap TeXable map of the 128 cities in miles.dat queen_wrap.ch Demonstration changefile sample.correct Correct primary output of test_sample test.correct Correct secondary output of test_sample test.dat Weird data used to test gb_io TO INSTALL THESE PROGRAMS First install CWEB (version 2.4 or greater), which can be found in various archives; the master files reside at labrea.stanford.edu. Then, on a UNIX-like system, edit the Makefile as instructed there, and "make install". Complete instructions will appear in a book by D. E. Knuth entitled The Stanford GraphBase: A Platform for Combinatorial Algorithms. Note: The system is presently in alpha-test state, meaning that everything appears to work on at least one system; but experience on a broad range of computers is lacking. Please communicate all suggested improvements to winkler@sunburn.stanford.edu, with subject line "GraphBase Alpha Test".

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## GraphBase – A platform for combinatorial algorithms

A `cweb` program developed (presumably) in pursuit of work
on ‘*The Art of Computer Programming*’.

Package | GraphBase |

License |
Knuth License |

Maintainer |
Donald E. Knuth |

Topics |
graphics generator whose output is good for use with TeX |