Bo Dai

collaborators

2 papers

math.DG2019

Geometric automorphism groups of symplectic 4-manifolds

Bo Dai, Chung-I Ho, Tian-Jun Li

Let $M$ be a closed, oriented, smooth $4 -$ manifold with intersection form $Γ$ , $A (Γ)$ the automorphism group of $Γ$ and $D (M)$ the subgroup induced by orientation-preserving diffeo…

math.SG2019

Non-orientable Lagrangian surfaces in rational 4-manifolds

Bo Dai, Chung-I Ho, Tian-Jun Li

We show that for any nonzero class $A$ in $H_{2} (X; Z_{2})$ in a rational 4-manifold $X$ , $A$ is represented by a nonorientable embedded Lagrangian surface L (for some symplec…