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Abelian differentials with prescribed singularities. (Différentielles abéliennes à singularités prescrites.) (French. English summary) Zbl 07388595
Summary: The local invariants of a meromorphic abelian differential on a Riemann surface of genus $$g$$ are the orders of zeros and poles, and the residues at the poles. The main result of this paper is that with few exceptions, every pattern of orders and residues can be obtain by an abelian differential. These exceptions are two families in genus zero when the orders of the poles are either all simple or all nonsimple. Moreover, we even show that the pattern can be realized in each connected component of the strata. Finally we give consequences of these results in algebraic and flat geometry. The main ingredient of the proof is the flat representation of the abelian differentials.
##### MSC:
 30F30 Differentials on Riemann surfaces 57M50 General geometric structures on low-dimensional manifolds 14H55 Riemann surfaces; Weierstrass points; gap sequences
##### Keywords:
abelian differential; flat surface; strata; residue
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##### References:
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