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Short helpfile for action MAZE_LOSS
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The following arguments are compulsory: 

                 PARAMS - Parameters for the loss function. 

In addition you may use the following options: 

  NUMERICAL_DERIVATIVES - ( default=off ) calculate the derivatives for these 
                          quantities numerically 
                  NOPBC - ( default=off ) ignore the periodic boundary conditions 
                          when calculating distances 

