[Haskell-cafe] ANN: The Typeclassopedia, and request for feedback

[Roman Cheplyaka]

* Wolfgang Jeltsch <g9ks157k at acme.softbase.org> [2009-02-17 13:30:22+0100]
> Am Dienstag, 17. Februar 2009 00:32 schrieb George Pollard:
> > On Mon, 2009-02-16 at 15:30 +0100, Fraser Wilson wrote:
> > > Super!  Also, best definition of bottom I've yet seen -- "ignoring _|
> > > _, which is a party pooper".  Like good code, it's short, to the
> > > point, and obviously correct.
> >
> > This brings up something I've thought about: On page 8,  it is said that
> > Pointed doesn't need to be checked because the theorem comes for free,
> > but the free theorems paper was based upon total functions only; does
> > having _|_ affect the free theorem for Pointed?
> 
> This was my question to Janis Voigtländer after his HaL 3 talk. He said that 
> the free theorem stuff also holds in the presence of _|_, it’s just a bit 
> more complicated to prove it. At least, this is how I understood it. :-) 

This paper was recently cited in -cafe; doesn't it help here?
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.59.8232

-- 
Roman I. Cheplyaka :: http://ro-che.info/
"Don't let school get in the way of your education." - Mark Twain