Description of the

ABCFIT

Program Flow

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In the following the program flow for each user entry point in the ABCFIT program package is listed. The level of calling goes from left to the right and the purpose of each routine is briefly described. 
various user entry points to the ABCFIT package are described.
 
 

ABCFIT Main fitting routine where the iterative true binning fit is done	===>	ABCFITKERNEL  Kernel fitting routine where the iterative minimisation using Lagrange multipliers is performed	===>	ABPUF Routine to parse and   report on user given   options
			===>	DEFUVEC Calculation of basis vectors for pararmeterisation
			===>	AIBI_EVOL(_USER) Determination of starting values and errors of the fit parameters	===>	ASYM Asymmetric parameterisation polynomial function
					===>	SYM Symmetric parameterisa- tion polynomial function
			===>	BMATRIX Calculation of the derivatives of the constrains with respect to the fit parameters -- the so-called BMATRIX.	===>	CVY2P Converts fit parameters to 4-momenta
					===>	FY Calculates values of constrain functions
					===>	DP_DPARAM Derivatives of particle 4-momenta with respect to fit parameters
					===>	DFDP Derivatives of the constrains with respect to the particle momenta	===>	DM_DP Derivatives of  invariant mass with respect to the particle momenta
			===>	REMAP Routine to swap ranges of fit parameters. Used for certain fits involving unmeasured particles.
			===>	CVY2P Converts fit parameters to 4-momenta
			===>	Many routines in CERNLIB to do Matrix calculations

 
 

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CY02PM Routine to convert the ABCFIT covariance matrix into momentum and mass covariance matrices by error propagation.	===>	CVY2P Converts fit parameters to 4-momenta
	===>	DP_DPARAM Derivatives of particle 4-momenta with respect to fit parameters	===>	DM_DP Derivatives of  invariant mass with respect to the particle momenta
	===>	Many routines in CERNLIB to do Matrix calculations