The Friendship Theorem
In this article we prove the friendship theorem according to the article [1], which states that if a group of people has the property that any pair of persons have exactly one common friend, then there is a universal friend, i.e. a person who is a friend of every other person in the group
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| Format: | Article |
| Language: | English |
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Sciendo
2012-12-01
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| Series: | Formalized Mathematics |
| Online Access: | https://doi.org/10.2478/v10037-012-0028-7 |