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A signed graph is a graph with a sign attached to each of its edges. In this paper, we apply the coefficient theorem on the characteristic polynomial of a signed graph and give two formulae on the nullity of signed graphs with cut-points. As applications of the above results, we investigate the nullity of the bicyclic signed graph<mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M1\"><mml:mi>\u0393<\/mml:mi><mml:mfenced separators=\"|\"><mml:mrow><mml:mi>\u221e<\/mml:mi><mml:mfenced separators=\"|\"><mml:mrow><mml:mi>p<\/mml:mi><mml:mo>,<\/mml:mo><mml:mi>q<\/mml:mi><mml:mo>,<\/mml:mo><mml:mi>l<\/mml:mi><\/mml:mrow><\/mml:mfenced><\/mml:mrow><\/mml:mfenced><\/mml:math>, obtain the nullity set of unbalanced bicyclic signed graphs, and thus determine the nullity set of bicyclic signed graphs.<\/jats:p>","DOI":"10.1155\/2014\/483735","type":"journal-article","created":{"date-parts":[[2014,2,18]],"date-time":"2014-02-18T16:02:35Z","timestamp":1392739355000},"page":"1-8","source":"Crossref","is-referenced-by-count":2,"title":["Further Results on the Nullity of Signed Graphs"],"prefix":"10.1155","volume":"2014","author":[{"given":"Yu","family":"Liu","sequence":"first","affiliation":[{"name":"School of Mathematical Sciences, South China Normal University, Guangzhou 510631, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lihua","family":"You","sequence":"additional","affiliation":[{"name":"School of Mathematical Sciences, South China Normal University, Guangzhou 510631, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","reference":[{"key":"2","first-page":"60","volume":"16","year":"2007","journal-title":"Electronic Journal of Linear Algebra"},{"key":"3","doi-asserted-by":"publisher","DOI":"10.1007\/BF02941924"},{"key":"8","doi-asserted-by":"publisher","DOI":"10.1016\/j.laa.2011.06.039"},{"key":"10","doi-asserted-by":"publisher","DOI":"10.1016\/S0012-365X(00)00187-4"},{"key":"11","first-page":"137","volume":"14(22)","year":"2011","journal-title":"Zbornik Radova"},{"key":"15","doi-asserted-by":"publisher","DOI":"10.1016\/j.laa.2007.12.007"},{"issue":"1","key":"18","first-page":"21","volume":"60","year":"2008","journal-title":"Match"},{"key":"19","doi-asserted-by":"publisher","DOI":"10.1063\/1.1747618"},{"issue":"1","key":"12","first-page":"143","volume":"2","year":"1953","journal-title":"The Michigan Mathematical Journal"},{"key":"1","doi-asserted-by":"publisher","DOI":"10.1006\/jabr.1994.1059"},{"key":"4","year":"1995"},{"key":"5","doi-asserted-by":"publisher","DOI":"10.1002\/jgt.3190040102"},{"key":"6","doi-asserted-by":"publisher","DOI":"10.1016\/j.laa.2012.08.027"},{"key":"7","doi-asserted-by":"publisher","DOI":"10.1080\/03081087.2013.771638"},{"key":"9","first-page":"25","volume":"42","year":"1995","journal-title":"Bulletin of the Institute of Chemistry, Academia Sinica"},{"key":"13","doi-asserted-by":"publisher","DOI":"10.1080\/0308108031000053611"},{"key":"14","doi-asserted-by":"publisher","DOI":"10.1007\/s10114-004-0437-9"},{"key":"16","doi-asserted-by":"publisher","DOI":"10.1016\/0009-2614(87)80219-1"},{"key":"17","doi-asserted-by":"publisher","DOI":"10.1002\/qua.560490509"},{"key":"20","doi-asserted-by":"publisher","DOI":"10.1016\/S1571-0653(04)00017-4"},{"key":"21","doi-asserted-by":"publisher","DOI":"10.1016\/j.cplett.2008.01.055"}],"container-title":["Journal of Applied Mathematics"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/downloads.hindawi.com\/journals\/jam\/2014\/483735.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"http:\/\/downloads.hindawi.com\/journals\/jam\/2014\/483735.xml","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"http:\/\/downloads.hindawi.com\/journals\/jam\/2014\/483735.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2016,7,28]],"date-time":"2016-07-28T20:18:21Z","timestamp":1469737101000},"score":1,"resource":{"primary":{"URL":"http:\/\/www.hindawi.com\/journals\/jam\/2014\/483735\/"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2014]]},"references-count":21,"alternative-id":["483735","483735"],"URL":"https:\/\/doi.org\/10.1155\/2014\/483735","relation":{},"ISSN":["1110-757X","1687-0042"],"issn-type":[{"value":"1110-757X","type":"print"},{"value":"1687-0042","type":"electronic"}],"subject":[],"published":{"date-parts":[[2014]]}}}