2012-04-27 Segalの講義録 リンク TQFT 以前もURLを貼ったが: http://www.cgtp.duke.edu/ITP99/segal/stanford/lect1.pdf http://www.cgtp.duke.edu/ITP99/segal/stanford/lect2.pdf http://www.cgtp.duke.edu/ITP99/segal/stanford/lect3.pdf http://www.cgtp.duke.edu/ITP99/segal/stanford/lect5.pdf