✦ LIBER ✦

R(4, 5) = 25

✍ Scribed by Brendan D. McKay; Stanislaw P. Radziszowski

Book ID: 102893228
Publisher: John Wiley and Sons
Year: 1995
Tongue: English
Weight: 674 KB
Volume: 19
Category: Article
ISSN: 0364-9024
DOI: 10.1002/jgt.3190190304

No coin nor oath required. For personal study only.

✦ Synopsis

The Ramsey number R(4,5) is defined to be the least positive integer n such that every n-vertex graph contains either a clique of order 4 or an independent set of order 5. With the help of a long computation using novel techniques, w e prove that R(4,5) = 25.

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