Class inte_qagiu_gsl (o2scl)¶

template<class func_t = funct> class inte_qagiu_gsl : public o2scl::inte_transform_gsl<funct>¶

Integrate a function over the interval \( [a, \infty) \) (GSL)

The integral on the unbounded interval is rewritten over the semi-open interval \( (0, 1] \) via a variable transformation,

\[ \int_a^{\infty} f(x)~dx = \int_0^1 f(a + (1-t)/t)t^{-2}~dt, \]

and the right hand side is evaluated with o2scl::inte_qags_gsl.

See GSL-based integration details in the User’s guide for general information about the GSL integration classes.

Public Functions

inline virtual int integ_iu_err(func_t &func, double a, double &res, double &err)¶: Integrate a function over the interval \( [a, \infty) \) giving result res and error err.

inline virtual int integ_err(func_t &func, double a, double b, double &res, double &err)¶

Integrate a function over the interval \( [a, \infty) \) giving result res and error err.

The value b is ignored.

inline virtual const char *type()¶: Return string denoting type (“inte_qagiu_gsl”)

Protected Functions

inline virtual double transform(double t, func_t &func)¶: Transform to \( t \in (0,1] \).

Protected Attributes