The library-defined partial specializations
of mathematical constant variable templates
are initialized with the nearest representable values of
e,
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
.