Eckmann-Hilton 2 (beware typo at 4:13)

We use the Eckmann-Hilton argument to show that a bicategory with only one object and only one 1-cell is a commutative monoid. TYPO ALERT: at 4.13 mins I write "only one 2-cell" but I mean "only one 1-cell".

Category:

Howto & Style

Tags:

• Eckmann
• Hilton
• bicategory
• commutative
• monoid

[TheCatsters]

Oops! Thanks for pointing out the typo.

[wackford1]

Hi catster,

just pointing out what seems to be a small mistake: you say a 2-category with one 0-cell and one 1-cell is a commutative monoid, but you write down "a 2-category with one 0-cell and one 2-cell" where I think you meant to write the first.

Thanks for all the talks. I've watched them all and learnt alot. Much appreciated.