FIG. 4. different colors. Despite persistent efforts, the truth of this conjecture has not yet been established, although five colors are known to be enough. Of like intriguing simplicity is the question raised a few years ago by the Japanese mathematician... The Origin, Nature, and Influence of Relativity: Lowell Institute Lectures ... - Seite 4 von George David Birkhoff - 1925 - 185 Seiten Vollansicht -
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