sniffnoy | Return of the "co-" files.

So a while ago -- honestly, I think I just won't bother to dig up the entry -- I made a list of mathematical terms where the "co-" prefix has its ordinary English meaning, rather than denoting complementation or dualization.

Yesterday I remembered one that wasn't on my list: "cobordism". (And the adjective form, "cobordant".)

I was telling this to Hunter, and he responded, "Isn't cobordism dual to bordism?" I was pretty sure it wasn't, but this isn't my area so I looked it up. And, it isn't. "Co-" has the ordinarily English meaning in "cobordism"; "bordism" is pretty much just a shortened form of the word.

So, yay. Still a pretty short list though.

-Harry