%0 Journal Article %T Canonical Bases of Borcherds-Cartan Type %A Yiqiang Li %A Zongzhu Lin %J Mathematics %D 2008 %I arXiv %X We study the canonical basis for the negative part of the quantum generalized Kac-Moody algebra associated to a symmetric Borcherds-Cartan matrix. The algebras associated to two different matrices satisfying certain conditions may coincide. We show that the canonical bases coincide provided that the algebras coincide. We also answer partially a question by Lusztig. %U http://arxiv.org/abs/0812.1449v1