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math.GT2001
Bordism of Unoriented Surfaces in 4-Space
J. Scott Carter, Seiichi Kamada, Masahico Saito +1
The group of bordism classes of unoriented surfaces in 4-space is determined. The bordism classes are characterized by normal Euler numbers,double linking numbers, and triple linki…
math.GT2001
Diagrammatic Computations for Quandles and Cocycle Knot Invariants
J. Scott Carter, Seiichi Kamada, Masahico Saito
The state-sum invariants for knots and knotted surfaces defined from quandle cocycles are described using the Kronecker product between cycles represented by colored knot diagrams…