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math.AG2008★ 1 cited
Derived Kodaira Spencer map, Cosection lemma, and semiregularity
Huai-Liang Chang
The cosection lemma proved by J. Li and Y.H. Kiem said the intrinsic normal cone lies inside the kernel of any cosection of the obstruction sheaf when the moduli has a perfect obst…
math.AG2007
Donaldson Thomas invariant of P^1 scroll
Huai-Liang Chang
Let X be a P^1 scroll (a compactification of a line bundle L) over a complex surafce S and assume S has a global two form with zero loci a smooth curve C. The Donaldson Thomas inva…