On Noether's inequality for stable log surfaces

Tuesday, December 6, 2016 -
4:30pm to 5:30pm
In this talk I report on some recent progress on the geography problem of stable log surfaces. This is about restrictions on their holomorphic invariants, such as the volume K^2 and the geometric genus p_g. Compared to the case of surfaces of general type, a new feature here is that the volume of a stable log surface is not necessarily an integer. Extending the work of Tsunoda and Zhang in the nineties, I will give an optimal lower bound of the volume when the geometric genus is one. Then I will use an example to illustrate that a speculated Noether type inequality for stable log surfaces does not hold in general.
Speaker: 
Wenfei Liu
Xiamen University
Event Location: 
Fine Hall 322