The Wikipedia article on Wolfgang Haken, the German American mathematician who proved the Four Color Theorem with Kenneth Appel in 1976.
Facts
Citation
PublisherWikimedia Foundation
URLhttps://en.wikipedia.org/wiki/Wolfgang_Haken
Source TypeEncyclopedia
Assessment
Reliability Tier2
Sources
Claims Backed By This Source (12 claims)
This source backs 12 claims across the atlas. As facts: 10 well-attested. Plus 2 entities citing it as a general reference with no single fact or relationship attached.
Disposition By Topic
- Mathematicians, 7 claims: 5 well-attested, 2 general references.
- Sources, 5 claims: 5 well-attested.
Reader Challenges (0 open reader challenges)
No disputes yet. Spotted an error or a better source? Open the first one.
Sign in to dispute this or suggest a correction.
View At A Past Year
The atlas records no dated fact of its own for this entry, so there is no other year to choose.