# groupoid (category theoretic)

## Primary tabs

Defines:
composable pair
Synonym:
groupoid, virtual group
Type of Math Object:
Definition
Major Section:
Reference

## Mathematics Subject Classification

### Parenthetical classification in object name

I thought that this was bad practise. Doesn't the MSC make this superfluous? Or because this concept of groupoid is so close semantically (that is, algebra) to the one in group theory that you require the parenthetical remark?

- J"

### Re: Parenthetical classification in object name

It's for indexing purposes. Think of the search results screen: if you see

groupoid
blah dee blah

groupoid
blah de blah

Which one do you pick? It's even worse for the alphabetical listing.

If you put "hinting" in the actual title, but synonym the "real" title, this problem goes away.

apk

### Re: Parenthetical classification in object name

In that case,

needs to be updated.

- J"

### Re: Parenthetical classification in object name

Oops, never mind. There is already a clause saying when this is appropriate. :P

- J"

### Re: Parenthetical classification in object name

Oops, never mind. There is already a clause saying when this is appropriate. :P

- J"