For a one parameter family of Calabi-Yau threefolds, Green et al.(2009) expressed the total singularities in terms of th......

In this paper we study low-degree low-genus curves in a generic hypersurface X of degree(3, 3) in P^2× P^2. We prov......

证明例1中的DG代数不仅是Koszul，同调光滑DG代数，而且还是一个Calabi—YauDG代数．该例子说明一个Calabi—YauDG代数的同调分次代数不......