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template <class ForwardIterator>
        
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bool
        
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    linearly_independent ( ForwardIterator first,  ForwardIterator last)
        
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    decides whether the vectors in A = tuple [first,last)
  are linearly independent.  | Precondition:  | The objects in A are of
  the same dimension.  |  
 | Requirement:  | The value type of
  ForwardIterator is Vector_d<R>. |   
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