Notes for 6 1's three dimensional invariants: Difference between revisions

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[[Image:6_1_is_doubly_slice.jpg|thumb|135px|right|[[6_1]] is doubly slice, by Scott Carter]] Scott Carter notes that [[6_1]] is doubly slice - it bounds two distinct slice disks. He says: "this was spoken of in Fox's Example 10, 11, and 12 in ''a Quick Trip through Knot Theory'' ... BTW, the cover of Carter and Saito's ''Knotted Surfaces and Their Diagrams'' contains an illustration of such a slice disk". A picture is on the right.
[[Image:6_1_is_doubly_slice.jpg|thumb|135px|right|[[6_1]] has two slice disks, by Scott Carter]] Scott Carter notes that bounds two distinct slice disks. He says: "this was spoken of in Fox's Example 10, 11, and 12 in ''a Quick Trip through Knot Theory'' ... BTW, the cover of Carter and Saito's ''Knotted Surfaces and Their Diagrams'' contains an illustration of such a slice disk". A picture is on the right.

Revision as of 15:08, 13 July 2020


6_1 is a ribbon knot (drawings by Yoko Mizuma):

a ribbon diagram
isotopy to a ribbon
6_1 has two slice disks, by Scott Carter

Scott Carter notes that bounds two distinct slice disks. He says: "this was spoken of in Fox's Example 10, 11, and 12 in a Quick Trip through Knot Theory ... BTW, the cover of Carter and Saito's Knotted Surfaces and Their Diagrams contains an illustration of such a slice disk". A picture is on the right.