In this paper we introduce the nullity of signed graphs, and give some results on the nullity of signed graphs with pendant trees. We characterize the unicyclic signed graphs of order n with nullity n-2; n-3; n-4; n-5 respectively.
@article{arxiv.1107.0400,
title = {The nullity of unicyclic signed graphs},
author = {Yi-Zheng Fan and Yue Wang and Yi Wang},
journal= {arXiv preprint arXiv:1107.0400},
year = {2013}
}