/usr/include/CLHEP/GenericFunctions/DefiniteIntegral.hh is in libclhep-dev 2.1.4.1+dfsg-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// $Id: DefiniteIntegral.hh,v 1.2 2003/09/06 14:04:13 boudreau Exp $
//-------------------------------------------------------------//
// //
// This functional performs Romberg integration on a function //
// between lower bound and upper bound b. //
// //
// Two types: OPEN: use open quadrature formula //
// for improper integrals //
// CLOSED (default) use closed quadrature //
// formula. //
// //
//-------------------------------------------------------------//
#ifndef _DefiniteIntegral_h_
#define _DefiniteIntegral_h_
#include "CLHEP/GenericFunctions/AbsFunctional.hh"
namespace Genfun {
/**
* @author
* @ingroup genfun
*/
class DefiniteIntegral:public AbsFunctional {
public:
// Type definition:
typedef enum {CLOSED, OPEN} Type;
// Constructor:
DefiniteIntegral(double a, double b, Type=CLOSED);
// Copy Constructor:
DefiniteIntegral(const DefiniteIntegral &);
// Assignment Operator:
DefiniteIntegral & operator=(const DefiniteIntegral &) ;
// Destructor:
~DefiniteIntegral();
// Take the definite integral of a function between the bounds:
virtual double operator [] (const AbsFunction & function) const;
// Retrieve the number of function calls for the last operation:
unsigned int numFunctionCalls() const;
// Algorithmic parameters:
// Desired precision (default 1.0E-06)
void setEpsilon(double eps);
// Maximum number of iterations (default 20(closed) 14 (open))
void setMaxIter (unsigned int maxIter);
// Minimum order:
void setMinOrder (unsigned int order);
private:
class Clockwork;
Clockwork *c;
};
} // namespace Genfun
#endif
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