Am Freitag, 8. Mai 2009 14:31 schrieb Daniel Fischer: > Though I had no contact with algebraists in the 1980s,
I also hadn’t. However, nowadays I have contact with someone who was an algebraist in the 1980s. It’s my boss (professor), by the way. :-) > > I think, also category theorists often wrote (write?) composition with > > the first morphism on the left, i.e., “the other way round”. > > Yeah, I heard that, too. It's a field where the advantages of postfix > notation show clearly and a young one, so for them it was relatively easy > to switch. However, I fear that all those other mathematicians who define f . g = \x -> f(g(x), have made the category theorists switch to this suboptimal notation (first morphism on the right). At least, I cannot remember seeing the other notation (first morphism on the left) in category theory literature so far. It’s just that my above-mentioned professor told me that category theorists would use the first-morphism-on-the-left notation. Best wishes, Wolfgang _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
