Stan Math Library  2.6.3
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constants.hpp File Reference
#include <boost/math/constants/constants.hpp>
#include <limits>

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Namespaces

 stan
 
 stan::math
 Matrices and templated mathematical functions.
 

Functions

double stan::math::pi ()
 Return the value of pi. More...
 
double stan::math::e ()
 Return the base of the natural logarithm. More...
 
double stan::math::sqrt2 ()
 Return the square root of two. More...
 
double stan::math::log10 ()
 Return natural logarithm of ten. More...
 
double stan::math::positive_infinity ()
 Return positive infinity. More...
 
double stan::math::negative_infinity ()
 Return negative infinity. More...
 
double stan::math::not_a_number ()
 Return (quiet) not-a-number. More...
 
double stan::math::machine_precision ()
 Returns the difference between 1.0 and the next value representable. More...
 

Variables

const double stan::math::E = boost::math::constants::e<double>()
 The base of the natural logarithm, $ e $. More...
 
const double stan::math::SQRT_2 = std::sqrt(2.0)
 The value of the square root of 2, $ \sqrt{2} $. More...
 
const double stan::math::INV_SQRT_2 = 1.0 / SQRT_2
 The value of 1 over the square root of 2, $ 1 / \sqrt{2} $. More...
 
const double stan::math::LOG_2 = std::log(2.0)
 The natural logarithm of 2, $ \log 2 $. More...
 
const double stan::math::LOG_10 = std::log(10.0)
 The natural logarithm of 10, $ \log 10 $. More...
 
const double stan::math::INFTY = std::numeric_limits<double>::infinity()
 Positive infinity. More...
 
const double stan::math::NEGATIVE_INFTY = - std::numeric_limits<double>::infinity()
 Negative infinity. More...
 
const double stan::math::NOT_A_NUMBER = std::numeric_limits<double>::quiet_NaN()
 (Quiet) not-a-number value. More...
 
const double stan::math::EPSILON = std::numeric_limits<double>::epsilon()
 Smallest positive value. More...
 
const double stan::math::NEGATIVE_EPSILON = - std::numeric_limits<double>::epsilon()
 Largest negative value (i.e., smallest absolute value). More...
 
const double stan::math::POISSON_MAX_RATE = std::pow(2.0, 30)
 Largest rate parameter allowed in Poisson RNG. More...
 
const double stan::math::LOG_PI_OVER_FOUR = std::log(boost::math::constants::pi<double>()) / 4.0
 Log pi divided by 4 $ \log \pi / 4 $. More...
 
const double stan::math::SQRT_PI = std::sqrt(boost::math::constants::pi<double>())
 
const double stan::math::SQRT_2_TIMES_SQRT_PI = SQRT_2 * SQRT_PI
 
const double stan::math::TWO_OVER_SQRT_PI = 2.0 / SQRT_PI
 
const double stan::math::NEG_TWO_OVER_SQRT_PI = -TWO_OVER_SQRT_PI
 
const double stan::math::INV_SQRT_TWO_PI = 1.0 / std::sqrt(2.0 * boost::math::constants::pi<double>())
 
const double stan::math::LOG_PI = std::log(boost::math::constants::pi<double>())
 
const double stan::math::LOG_SQRT_PI = std::log(SQRT_PI)
 
const double stan::math::LOG_ZERO = std::log(0.0)
 
const double stan::math::LOG_TWO = std::log(2.0)
 
const double stan::math::LOG_HALF = std::log(0.5)
 
const double stan::math::NEG_LOG_TWO = - LOG_TWO
 
const double stan::math::NEG_LOG_SQRT_TWO_PI = - std::log(std::sqrt(2.0 * boost::math::constants::pi<double>()))
 
const double stan::math::NEG_LOG_PI = - LOG_PI
 
const double stan::math::NEG_LOG_SQRT_PI = -std::log(std::sqrt(boost::math::constants::pi<double>()))
 
const double stan::math::NEG_LOG_TWO_OVER_TWO = - LOG_TWO / 2.0
 
const double stan::math::LOG_TWO_PI = LOG_TWO + LOG_PI
 
const double stan::math::NEG_LOG_TWO_PI = - LOG_TWO_PI
 

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