# D_Fischer

Calculates an element of the B-subdifferential of the Fischer-Burmeister function for complementarity problems.

## Synopsis

    #include "tao_solver.h"
    int TaoMat::D_Fischer(TaoVec *tx, TaoVec *tf, TaoVec *tl, TaoVec *tu,
                         TaoVec *tt1, TaoVec *tt2, TaoVec *tda, TaoVec *tdb )

## Input Parameters

| this | - the jacobian of tf at tx
| tx | - current point
| tf | - function evaluated at tx
| tl | - lower bounds
| tu | - upper bounds
| tt1 | - work vector
| tt2 | - work vector

## Output Parameters

| tda | - diagonal perturbation component of the result
| tdb | - row scaling component of the result

## See Also

TaoVec::Fischer()

Level:intermediate
Location:src/matrix/taomat.c
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