 Usage:  y=fnrici(x,z,i,j,zz,b)  
 
 Input:

  x                      matrix 
                         
  z                      matrix 
                         
  i                      integer 
                         
  j                      integer 
                         
  zz                     matrix 
                         
  b                      integer 
                         
 Output:

  y                      matrix 
                         
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(C) MD*TECH Method and Data Technologies, 17.8.2000
