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rjlipton.com | ||
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gilkalai.wordpress.com
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| | | | | A major progress on an old standing beautiful problem.Aubrey de Grey proved that the chromatic number of the plane is at least 5. (I first heard about it from Alon Amit.) TheHadwigerNelson problem asks for the minimum number of colors required to color theplanesuch that no twopointsat distance one from each other have the | |
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existentialtype.wordpress.com
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| | | | | The Christian doctrine of trinitarianism states that there is one God that is manifest in three persons, the Father, the Son, and the Holy Spirit, who together form the Holy Trinity. The doctrine of computational trinitarianism holds that computation manifests itself in three forms: proofs of propositions, programs of a type, and mappings between... | |
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micromath.wordpress.com
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| | | | | Continuing the theme of alternative approaches to teaching calculus, I take the liberty of posting a letter sent by Donald Knuth to to the Notices of the American Mathematical Society in March, 1998 (TeX file). Professor Anthony W. Knapp P O Box 333 East Setauket, NY 11733 Dear editor, I am pleased to see so... | |
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dominiczypen.wordpress.com
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| | | For $latex A, B \subseteq \omega$ we write $latex A \subseteq^* B$ if $latex A\setminus B$ is finite, and we write $latex A\simeq^* B$ if $latex A\subseteq^* B$ and $latex B\subseteq^* A$. A tower is a collection $latex {\cal T}$ of co-infinite subsets of $latex \omega$ such that for all $latex A\neq B\in {\cal T}$... | ||
