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      Let  be the field of formal
      transseries in
 be the field of formal
      transseries in  at infinity.
      We prove the following theorem: given a differential polynomial
 at infinity.
      We prove the following theorem: given a differential polynomial  and two transseries
 and two transseries  in
 in  such that
      such that  , there exists a
      transseries
, there exists a
      transseries  with
 with  and
 and  .
.
    
Occasions: Stokes Workshop, Groningen, May 29, 2001
Documents: slides, TeXmacs source