V. A. Gorbatov claims that he solved 4-color problem in 1964, and he repeats this claim in his book which appears in 2000. (The paper and the book are in Russian; the book is also translated to Spanish --- see refs below.) Obviousely, I doubt that it is true, but I do NOT want to read the book...
Question: Did anyone checked this proof?
Why do I care. This claim appears in Russian wikipedia and I would be happy to have a good reason to remove it. (At the moment ru.wikipedia states Gorbatov's claim and says that nobody checked his proof.)
- Горбатов В. А. Фундаментальные основы дискретной математики.
- Gorbatov, V. A. Fundamentos de la matemática discreta.
- Горбатов, В. А. О минимальной раскраске графа // Доклады НТК. МЭИ, Подсекция вычислительной техники. --М.: МЭИ, 1964. -С. 17.
Summary of answers: I have got few answers, roughly stating that there is no sign that Gorbatov is a serious mathematician. I agree with that, but it is not an answer to my question...