## Duality terminology

I should have mentioned this before, but usually dual notions are marked by the prefix “co-“. As an example, we have “well-powered” and “co-well-powered” categories.

Another example: We know through Erdős that “a mathematician is a device for turning coffee into theorems”. It thus follows by duality that a comathematician is a device for turning cotheorems into ffee.

And of course, we have commutative algebras and mmutative coalgebras.

Comment by Mikael Johansson | June 1, 2007 |

[…] This of course was taken from elsewhere, namely The Unapologetic Mathematician. […]

Pingback by Plied Higher and Deeper « Insert Title Here | June 2, 2007 |

In aviation, shouldn’t then the copilot just make the trip back home?

Comment by budapedestrian | January 27, 2010 |