knot page.
[Add Band]
This option performs adding bands for the following purposes.
- [Band surgery]
- saddle band for knotted surface in S^4.
In this version, it cannot distinguish upper or lower suddle,
So, we can not draw exact geometric condition but compute knot group and related invariants.
- 3rd element for theta 3 curve
Usage
- Prepare a diagram.
- Choose [Add Band].
- Left Click a vertex of knot/link in the diagram.
This set up the start point of the band.
- Draw tne band with left click.
- Right click to suspend the band not closed.
Left click the end point to resumption the band.
- Left click a vertex of knot/link.
This set up the end point and close the band.
knot page.