http://commons.apache.org/proper/commons-math/: The Apache Commons Math project is a library of lightweight, self-contained mathematics and statistics components addressing the most common practical problems not immediately available in the Java programming language or commons-lang. (The Apache Software Foundation)
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class org.apache.commons.math3.fitting.leastsquares.GaussNewtonOptimizer$Decomposition$2 extends org.apache.commons.math3.fitting.leastsquares.GaussNewtonOptimizer$Decomposition
  minor version: 0
  major version: 59
  flags: flags: (0x4020) ACC_SUPER, ACC_ANNOTATION
  this_class: org.apache.commons.math3.fitting.leastsquares.GaussNewtonOptimizer$Decomposition$2
  super_class: org.apache.commons.math3.fitting.leastsquares.GaussNewtonOptimizer$Decomposition
{
  void <init>(java.lang.String, int);
    descriptor: (Ljava/lang/String;I)V
    flags: (0x0000) 
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // org.apache.commons.math3.fitting.leastsquares.GaussNewtonOptimizer$Decomposition$2 this
         0: .line 87
            aload 0 /* this */
            aload 1
            iload 2
            invokespecial org.apache.commons.math3.fitting.leastsquares.GaussNewtonOptimizer$Decomposition.<init>:(Ljava/lang/String;I)V
            return
        end local 0 // org.apache.commons.math3.fitting.leastsquares.GaussNewtonOptimizer$Decomposition$2 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/apache/commons/math3/fitting/leastsquares/GaussNewtonOptimizer$Decomposition$2;
    MethodParameters:
               Name  Flags
      $enum$name     
      $enum$ordinal  

  protected org.apache.commons.math3.linear.RealVector solve(org.apache.commons.math3.linear.RealMatrix, org.apache.commons.math3.linear.RealVector);
    descriptor: (Lorg/apache/commons/math3/linear/RealMatrix;Lorg/apache/commons/math3/linear/RealVector;)Lorg/apache/commons/math3/linear/RealVector;
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=7, locals=4, args_size=3
        start local 0 // org.apache.commons.math3.fitting.leastsquares.GaussNewtonOptimizer$Decomposition$2 this
        start local 1 // org.apache.commons.math3.linear.RealMatrix jacobian
        start local 2 // org.apache.commons.math3.linear.RealVector residuals
         0: .line 92
            new org.apache.commons.math3.linear.QRDecomposition
            dup
            aload 1 /* jacobian */
            ldc 1.0E-11
            invokespecial org.apache.commons.math3.linear.QRDecomposition.<init>:(Lorg/apache/commons/math3/linear/RealMatrix;D)V
         1: .line 93
            invokevirtual org.apache.commons.math3.linear.QRDecomposition.getSolver:()Lorg/apache/commons/math3/linear/DecompositionSolver;
         2: .line 94
            aload 2 /* residuals */
            invokeinterface org.apache.commons.math3.linear.DecompositionSolver.solve:(Lorg/apache/commons/math3/linear/RealVector;)Lorg/apache/commons/math3/linear/RealVector;
         3: .line 92
            areturn
         4: .line 95
      StackMap locals:
      StackMap stack: org.apache.commons.math3.linear.SingularMatrixException
            astore 3 /* e */
        start local 3 // org.apache.commons.math3.linear.SingularMatrixException e
         5: .line 96
            new org.apache.commons.math3.exception.ConvergenceException
            dup
            getstatic org.apache.commons.math3.exception.util.LocalizedFormats.UNABLE_TO_SOLVE_SINGULAR_PROBLEM:Lorg/apache/commons/math3/exception/util/LocalizedFormats;
            iconst_1
            anewarray java.lang.Object
            dup
            iconst_0
            aload 3 /* e */
            aastore
            invokespecial org.apache.commons.math3.exception.ConvergenceException.<init>:(Lorg/apache/commons/math3/exception/util/Localizable;[Ljava/lang/Object;)V
            athrow
        end local 3 // org.apache.commons.math3.linear.SingularMatrixException e
        end local 2 // org.apache.commons.math3.linear.RealVector residuals
        end local 1 // org.apache.commons.math3.linear.RealMatrix jacobian
        end local 0 // org.apache.commons.math3.fitting.leastsquares.GaussNewtonOptimizer$Decomposition$2 this
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0    6     0       this  Lorg/apache/commons/math3/fitting/leastsquares/GaussNewtonOptimizer$Decomposition$2;
            0    6     1   jacobian  Lorg/apache/commons/math3/linear/RealMatrix;
            0    6     2  residuals  Lorg/apache/commons/math3/linear/RealVector;
            5    6     3          e  Lorg/apache/commons/math3/linear/SingularMatrixException;
      Exception table:
        from    to  target  type
           0     3       4  Class org.apache.commons.math3.linear.SingularMatrixException
    MethodParameters:
           Name  Flags
      jacobian   final
      residuals  final
}
SourceFile: "GaussNewtonOptimizer.java"
EnclosingMethod: org.apache.commons.math3.fitting.leastsquares.GaussNewtonOptimizer$Decomposition
NestHost: org.apache.commons.math3.fitting.leastsquares.GaussNewtonOptimizer
InnerClasses:
  public abstract Decomposition = org.apache.commons.math3.fitting.leastsquares.GaussNewtonOptimizer$Decomposition of org.apache.commons.math3.fitting.leastsquares.GaussNewtonOptimizer
  org.apache.commons.math3.fitting.leastsquares.GaussNewtonOptimizer$Decomposition$2