β Scribed by Wolfgang Haken
No coin nor oath required. For personal study only.
Is the recently obtained, computerβaided proof of the Four Color Theorem an isolated phenomenon or is its combinatorial complexity typical for a significantly large class of mathematical problems? While it is too early to give a definite answer to this question, an informal discussion is undertaken in this article.
π SIMILAR VOLUMES
The SOS Chromotest was carried out on leachates of ten industrial wastes with the standard procedure and a miniaturized version with microplates. The two methods gave identical results in nine samples (eight negative and one positive). A simple additional manipulation is described for the identifica
Ross (this issue) has made a useful contribution to the case for color realism (or ''physicalism'' as he prefers). It is a difficult case to make, and it would be premature to claim that Ross, or anyone, has yet solved all the difficulties of the position or made a case strong enough to convince a s