## Abstract The crossing number of __K~n~__ is known for __n__ββ©½β10. We develop several simple counting properties that we shall exploit in showing by computer that __cr__(__K__~11~β=β100, which implies that __cr__(__K__~12~)β=β150. We also determine the numbers of nonβisomorphic optimal drawings o
The genus 2 crossing number of K9
β Scribed by Adrian Riskin
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- English
- Weight
- 716 KB
- Volume
- 145
- Category
- Article
- ISSN
- 0012-365X
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β¦ Synopsis
Our main result is that a 1971 conjecture due to Paul Kainen is false. Kainen's conjecture implies that the genus 2 crossing number of K 9 is 3. We disprove the conjecture by showing that the actual value is 4. The method used is a new one in the study of crossing numbers, involving proof of the impossibility of certain genus 2 embeddings of Ks.
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