homotopy-rs
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Differences between framed vs oriented
Reidemeister I move (wire needs to be oriented and invertible):
Every monoid in a braided monoidal category is commutative (both the wire and monoid need to be oriented):
Similarly, given any 3-cell, you can swap any of its inputs/outputs (everything needs to be oriented):
Any invertible monoid gives rise to a Frobenius-like structure (monoid needs to be oriented, wire may be framed):
Any invertible monoid gives rise to a Frobenius-like structure (monoid needs to be oriented, wire may be framed):
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In what sense is this Frobenius? The connectivity between the two wires has been lost
Any invertible monoid gives rise to a Frobenius-like structure (monoid needs to be oriented, wire may be framed):
![]()
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.
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.
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.
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This is a special case of the contractibility of disks right?
Fun!
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.