Logo ROOT  
Reference Guide
NegativeG2LineSearch.h
Go to the documentation of this file.
1 // @(#)root/minuit2:$Id$
2 // Authors: M. Winkler, F. James, L. Moneta, A. Zsenei 2003-2005
3 
4 /**********************************************************************
5  * *
6  * Copyright (c) 2005 LCG ROOT Math team, CERN/PH-SFT *
7  * *
8  **********************************************************************/
9 
10 #ifndef ROOT_Minuit2_NegativeG2LineSearch
11 #define ROOT_Minuit2_NegativeG2LineSearch
12 
13 namespace ROOT {
14 
15 namespace Minuit2 {
16 
17 class MnFcn;
18 class MinimumState;
19 class GradientCalculator;
20 class MnMachinePrecision;
21 class FunctionGradient;
22 
23 /** In case that one of the components of the second derivative g2 calculated
24  by the numerical Gradient calculator is negative, a 1dim line search in
25  the direction of that component is done in order to find a better position
26  where g2 is again positive.
27  */
28 
30 
31 public:
33 
35 
37  operator()(const MnFcn &, const MinimumState &, const GradientCalculator &, const MnMachinePrecision &) const;
38 
39  bool HasNegativeG2(const FunctionGradient &, const MnMachinePrecision &) const;
40 
41 private:
42 };
43 
44 } // namespace Minuit2
45 
46 } // namespace ROOT
47 
48 #endif // ROOT_Minuit2_NegativeG2LineSearch
ROOT::Minuit2::MnFcn
Wrapper class to FCNBase interface used internally by Minuit.
Definition: MnFcn.h:30
ROOT::Minuit2::MinimumState
MinimumState keeps the information (position, Gradient, 2nd deriv, etc) after one minimization step (...
Definition: MinimumState.h:29
ROOT::Minuit2::NegativeG2LineSearch::~NegativeG2LineSearch
~NegativeG2LineSearch()
Definition: NegativeG2LineSearch.h:34
ROOT::Minuit2::FunctionGradient
Definition: FunctionGradient.h:21
ROOT::Minuit2::NegativeG2LineSearch::operator()
MinimumState operator()(const MnFcn &, const MinimumState &, const GradientCalculator &, const MnMachinePrecision &) const
Definition: NegativeG2LineSearch.cxx:27
ROOT::Minuit2::NegativeG2LineSearch::HasNegativeG2
bool HasNegativeG2(const FunctionGradient &, const MnMachinePrecision &) const
Definition: NegativeG2LineSearch.cxx:109
ROOT::Minuit2::MnMachinePrecision
Sets the relative floating point (double) arithmetic precision.
Definition: MnMachinePrecision.h:32
ROOT::Minuit2::NegativeG2LineSearch
In case that one of the components of the second derivative g2 calculated by the numerical Gradient c...
Definition: NegativeG2LineSearch.h:29
ROOT::Minuit2::GradientCalculator
interface class for gradient calculators
Definition: GradientCalculator.h:23
ROOT::Minuit2::NegativeG2LineSearch::NegativeG2LineSearch
NegativeG2LineSearch()
Definition: NegativeG2LineSearch.h:32
ROOT
tbb::task_arena is an alias of tbb::interface7::task_arena, which doesn't allow to forward declare tb...
Definition: EExecutionPolicy.hxx:4