Generic well-posedness in a
              multidimensional hyperbolic inverse problem
              
              
                 J.P.Puel and M.Yamamoto
                 
                 
                 
                 
                 
 We consider two inverse problems for
 wave equatioms , namely identification of sources and     identification 
 of potentials. In the first case , we give a constructive result
 of uniqueness and stability showing the equivalence with an
 exact controllability problem. We study the second problem in
 its linearized version in a first step. We prove  a uniqueness
 and stability result for a generic set of datas , using again
 an auxiliary exact controllabilty problem.We then apply these
 results for proving a local result of uniqueness and stability
 for the full problem.                 



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