ConstantsΒΆ
The following constants are available:
| Constant | Value | Comment |
|---|---|---|
gammalib::pi |
\(\pi\) | |
gammalib::twopi |
\(2\pi\) | |
gammalib::fourpi |
\(4\pi\) | |
gammalib::pihalf |
\(\pi/2\) | |
gammalib::inv_pihalf |
\((\pi/2)^{-1}\) | |
gammalib::inv_sqrt2pi |
\((\sqrt{2\pi})^{-1}\) | |
gammalib::inv_sqrt4pi |
\((\sqrt{4\pi})^{-1}\) | |
gammalib::pi2 |
\(\pi^2\) | |
gammalib::deg2rad |
\(\pi/180\) | Multiplication converts degrees to radians |
gammalib::rad2deg |
\(180/\pi\) | Multiplication converts radians to degrees |
gammalib::ln2 |
\(\log 2\) | Natural logarithm of 2 |
gammalib::ln10 |
\(\log 10\) | Natural logarithm of 10 |
gammalib::inv_ln2 |
\((\log 2)^{-1}\) | |
gammalib::inv_ln10 |
\((\log 10)^{-1}\) | |
gammalib::inv_loge |
\((\log_{10}(\exp 1))^{-1}\) | |
gammalib::onethird |
\(1/3\) | |
gammalib::twothird |
\(2/3\) | |
gammalib::fourthird |
\(4/3\) | |
gammalib::sqrt_onehalf |
\(\sqrt{1/2}\) | |
gammalib::sqrt_pihalf |
\(\sqrt{\pi/2}\) | |
gammalib::sqrt_two |
\(\sqrt{2}\); | |
gammalib::sqrt_twopi |
\(\sqrt{2\pi}\) |