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Differences between framed vs oriented

Open calintat opened this issue 2 years ago • 8 comments

Reidemeister I move (wire needs to be oriented and invertible):

homotopy_io_export homotopy_io_export(1)

calintat avatar Jul 25 '22 15:07 calintat

Every monoid in a braided monoidal category is commutative (both the wire and monoid need to be oriented):

homotopy_io_export(2) homotopy_io_export(3)

Similarly, given any 3-cell, you can swap any of its inputs/outputs (everything needs to be oriented):

homotopy_io_export(6) homotopy_io_export(7)

calintat avatar Jul 25 '22 15:07 calintat

Any invertible monoid gives rise to a Frobenius-like structure (monoid needs to be oriented, wire may be framed):

homotopy_io_export(4) homotopy_io_export(5)

calintat avatar Jul 25 '22 15:07 calintat

Any invertible monoid gives rise to a Frobenius-like structure (monoid needs to be oriented, wire may be framed):

homotopy_io_export(4) homotopy_io_export(5)

In what sense is this Frobenius? The connectivity between the two wires has been lost

NickHu avatar Jul 25 '22 18:07 NickHu

Any invertible monoid gives rise to a Frobenius-like structure (monoid needs to be oriented, wire may be framed): homotopy_io_export(4) homotopy_io_export(5)

In what sense is this Frobenius? The connectivity between the two wires has been lost

Yeah I probably shouldn't have called it Frobenius, though it's like a degenerate Frobenious law.

calintat avatar Jul 25 '22 20:07 calintat

Here is another interesting one...

Given an oriented 2-cell on a (framed) invertible 1-cell, its trace contracts to a scalar version of the 2-cell. homotopy_io_export homotopy_io_export(1)

calintat avatar Aug 03 '22 13:08 calintat

Here is another interesting one...

Given an oriented 2-cell on a (framed) invertible 1-cell, its trace contracts to a scalar version of the 2-cell. homotopy_io_export homotopy_io_export(1)

This is a special case of the contractibility of disks right?

doctorn avatar Aug 03 '22 14:08 doctorn

Fun!

Contract

doctorn avatar Aug 03 '22 15:08 doctorn

Thanks for these great points on this thread. Manuel and I had a long discussion about it. Let's all talk together when you guys are back from FLOC.

jamievicary avatar Aug 05 '22 18:08 jamievicary