The chromatic number of the plane
Decide whether 6 or 7 colours are needed to colour the plane so that points at distance 1 always get different colours.
PR
PR 把工作从一条路线带到另一条;合并它就是采纳。
没有开放的 PR
PR 把工作从一个分支带到另一个分支。
Decide whether 6 or 7 colours are needed to colour the plane so that points at distance 1 always get different colours.
PR 把工作从一条路线带到另一条;合并它就是采纳。
PR 把工作从一个分支带到另一个分支。