BRANCHED SHADOWS AND COMPLEX STRUCTURES ON 4-MANIFOLDS
BRANCHED SHADOWS AND COMPLEX STRUCTURES ON 4-MANIFOLDS
复制标题
4 流形上的分支阴影和复杂结构
DOI:
10.1142/s0218216508006683
复制
发表时间:
2005
影响因子:
0.5
通讯作者:
F. Costantino
中科院分区:
文献类型:
--
作者:
F. Costantino
We define and study branched shadows of 4-manifolds as a combination of branched spines of 3-manifolds and of Turaev's shadows. We use these objects to combinatorially represent 4-manifolds equipped with Spinc-structures and homotopy classes of almost complex structures. We then use branched shadows to study complex 4-manifolds and prove that each almost complex structure on a 4-dimensional handlebody is homotopic to a complex one.