¼­¿ï´ë ÀÛ¿ë¼Ò ¼¼¹Ì³ª 2008 Jun 23: David Pask(Southern Illinois Univ. Edwardsville ); The gauge spectral triple of a graph algebra 1 2008 Jun 24: David Pask(Southern Illinois Univ. Edwardsville ); The gauge spectral triple of a graph algebra 2 2010 Jun 11: David Pask(Univ. of Wollongong); A quick introduction to k-graphs and their C*-algebras