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template <class ForwardIterator>
        
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int
        
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     fo ( 
ForwardIterator first
, 
 ForwardIterator last
)
        
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    computes
  the affine rank of the points in A = tuple [first,last).
  | Precondition:  | The objects are of the same dimension.
   |  
 | Requirement:  | The value type of ForwardIterator is
  Kernel::Point_d. |   
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