Name Takefumi Nosaka Kyoto university Session Jan 11 16:20~16:40 E11-103 On a topological interpretation of quandle cocycle invariants of classical links. S. Cater and M. Saito et al. introduced quandle cocycle invariants of classical links using quandle 2-cocycles with local coefficients. However the construction is combinatorially by using link-diagrams. In this talk, for some'' quandles, we give a topological interpretation of all the quandle cocycle invariants. Precisely, the cocycle invariant is a linear sum of colouring polynomial'' introduced by M. Eisermann and of a certain part of the Dijkgraaf-Witten invariant. 103-1-11/12.01.KAIST.happyou2.pdf