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math.AG2016
Remarks on Xiao's approach of Slope inequalities
Hao Sun, Xiaotao Sun, Mingshuo Zhou
We prove the slope inequality for a relative minimal surface fibration in positive characteristic via Xiao's approach. We also prove a better low bound for the slope of non-hyperel…
math.AG2012
On the Clifford theorem for surfaces
Hao Sun
We give two generalizations of the Clifford theorem to algebraic surfaces. As an application, we obtain some bounds for the number of moduli of surfaces of general type.