A chord graph in 3-space is constructed from a ribbon surface-link in 4-space. In earlier papers, the three moves on the diagrams of chord graphs (namely, the chord diagrams) were… Click to show full abstract
A chord graph in 3-space is constructed from a ribbon surface-link in 4-space. In earlier papers, the three moves on the diagrams of chord graphs (namely, the chord diagrams) were introduced to des...
               
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