- Wenhao Ou. Singular rationally connected srufaces with nonzero pluri-forms.
*Michigan Math. J.*, 63 (2014), no. 4, 725–745, arXiv preprint: 1301.0915.

**Abstract:**A complex variety is called rationally connected if any two general points can be connected by a rational curve. A pluri-form on a variety is a section of some tensor power of the differential sheaf on the smooth locus. It is known that nonsingular rationally connected varieties do not carry any nonzero pluri-form. In this paper, we classify all rationally connected surfaces with canonical singularities which carry some nonzero pluri-forms.

- Wenhao Ou. Singular rationally connected threefolds with nonzero pluri-forms.
*Nagoya Math. J.*, 221 (2016), 3–32, arXiv preprint: 1401.2014.

**Abstract:**In this paper, we classify the structure of complex rationally connected threefolds with terminal singularities which carry some nonzero pluri-forms. We also find out the sources of the pluri-forms of these varieties.

- Wenhao Ou. Lagrangian fibration on symplectic fourfolds. To appear in
*J. Reine Angew. Math.*,

**Abstract:**Let us consider a Lagrangian fibration from a complex projective irreducible symplectic manifold*M*to a normal variety*X*. If we assume that the base*X*is smooth, then

Hwang proves that*X*is always isomorphic to the projective space. However, it is still unclear whether*X*is always smooth. In this paper, we study de case when*M*has dimension four and*X*is a surface. We prove that there are at most two possibilities for*X*: either it is the projective space or it is a singular Fano surface which can be constructed explicitly.

- Wenhao Ou. Fano varieties with
*Nef*(*X*)=*Psef*(*X*) and*ρ*(*X*)=dim*X−*1. arXiv preprint: 1508.00182.

**Abstract:**For any normal projective variety*X*, we always have the natural inclusion from Nef (*X*) to Psef (*X*). We consider the case when this inclusion is an equality and the variety X is a mildly singular Fano variety. The Picard number of such a variety is at most equal to the variety's dimension. Druel classifies such varieties in the case when these two numbers are equal. In this paper, we classify such varieties whose Picard numbers are equal to their dimensions minus one.

- Wenhao Ou. On generic nefness of tangent sheaves. arXiv preprint: 1703.03175.

**Abstract:**We show that the tangent bundle of a projective manifold with nef anticanonical class is generically nef. That is, its restriction to a curve cut out by general sufficiently ample divisors is a nef vector bundle.

- Wenhao Ou and Ye-Ping Zhang.
*Théorème de Chow*. http://www2.fimfa.ens.fr/telecharger_fichier.php?fichier=375.