A Computer Search for Factorialsum Numbers
β Scribed by John Lamb Jr.
- Book ID
- 114978309
- Publisher
- School Science and Mathematics Association
- Year
- 1988
- Tongue
- English
- Weight
- 150 KB
- Volume
- 88
- Category
- Article
- ISSN
- 0036-6803
No coin nor oath required. For personal study only.
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## Abstract In this article we give examples of a triangleβfree graph on 22 vertices with chromatic number 5 and a __K__~4~βfree graph on 11 vertices with chromatic number 5. We very briefly describe the computer searches demonstrating that these are the smallest possible such graphs. All 5βcritica