SUGAKU
Online ISSN : 1883-6127
Print ISSN : 0039-470X
ISSN-L : 0039-470X
Expository articles
The four color theorem and its aftermath
Atsuhiro NakamotoKenta Ozeki
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2021 Volume 73 Issue 2 Pages 133-160

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© 2021 The Mathematical Society of Japan
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