constants.hpp

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#ifndef __STAN__MATH__CONSTANTS_HPP__
#define __STAN__MATH__CONSTANTS_HPP__

#include <boost/math/constants/constants.hpp>

namespace stan {

  namespace math {

    const double E = boost::math::constants::e<double>();

    const double SQRT_2 = std::sqrt(2.0);

    const double LOG_2 = std::log(2.0);

    const double LOG_10 = std::log(10.0);

    const double INFTY = std::numeric_limits<double>::infinity();

    const double NEGATIVE_INFTY = - std::numeric_limits<double>::infinity();

    const double NOT_A_NUMBER = std::numeric_limits<double>::quiet_NaN();
    
    const double EPSILON = std::numeric_limits<double>::epsilon();

    const double NEGATIVE_EPSILON = - std::numeric_limits<double>::epsilon();

  }
}

#endif