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cppdraft/math/constants.md

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+[math.constants]
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+# 29 Numerics library [[numerics]](./#numerics)
+
+## 29.8 Numbers [[numbers]](numbers#math.constants)
+
+### 29.8.2 Mathematical constants [math.constants]
+
+[1](#1)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/numerics.tex#L10887)
+
+The library-defined partial specializations
+of mathematical constant variable templates
+are initialized with the nearest representable values ofe,log2e,log10e,π,1π,1√π,ln2,ln10,√2,√3,1√3,
+the Euler-Mascheroni γ constant, and
+the golden ratio φ constant 1+√52,
+respectively[.](#1.sentence-1)
+
+[2](#2)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/numerics.tex#L10906)
+
+Pursuant to [[namespace.std]](namespace.std "16.4.5.2.1 Namespace std"),
+a program may partially or explicitly specialize
+a mathematical constant variable template
+provided that the specialization depends on a program-defined type[.](#2.sentence-1)
+
+[3](#3)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/numerics.tex#L10912)
+
+A program that instantiates a primary template
+of a mathematical constant variable template is ill-formed[.](#3.sentence-1)