Re: [Haskell-cafe] Clearly, Haskell is ill-founded

2007-07-17 Thread Isaac Dupree
Conor McBride wrote: Hi all On 9 Jul 2007, at 06:42, Thomas Conway wrote: I don't know if you saw the following linked off /. http://www.itwire.com.au/content/view/13339/53/ [..] The basic claim appears to be that discrete mathematics is a bad foundation for computer science. I suspect

Re: [Haskell-cafe] Clearly, Haskell is ill-founded

2007-07-16 Thread Conor McBride
Hi Derek On 16 Jul 2007, at 02:48, Derek Elkins wrote: On Mon, 2007-07-16 at 02:29 +0100, Conor McBride wrote: Hi data{-codata-} Punter = Speak String (String - Punter) [..] data{-codata-} Stream x = x : (Stream x) cafe :: Punter - (String - Punter) - Stream (String, String) cafe

Re: [Haskell-cafe] Clearly, Haskell is ill-founded

2007-07-15 Thread Conor McBride
Hi Whoops! Only just spotted this. Many apologies. On 10 Jul 2007, at 20:35, Creighton Hogg wrote: Me: No, an operating system is supposed to remain responsive. And that's what total coprograms do. I'm sorry, but can you expand a little further on this? I guess I don't understand

Re: [Haskell-cafe] Clearly, Haskell is ill-founded

2007-07-15 Thread Derek Elkins
On Mon, 2007-07-16 at 02:29 +0100, Conor McBride wrote: Hi Whoops! Only just spotted this. Many apologies. On 10 Jul 2007, at 20:35, Creighton Hogg wrote: Me: No, an operating system is supposed to remain responsive. And that's what total coprograms do. I'm sorry, but can

Re: [Haskell-cafe] Clearly, Haskell is ill-founded

2007-07-11 Thread Dougal Stanton
On 11/07/07, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: You mean nstructed. Now if you'l excuse me, I'm off to write some de. Ah, everyone's a median ;-) Cheers, Dougal. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org

Re: [Haskell-cafe] Clearly, Haskell is ill-founded

2007-07-10 Thread Stefan O'Rear
On Tue, Jul 10, 2007 at 08:08:52PM +0100, Andrew Coppin wrote: Erm... Wait a sec... coroutines, comonads, coprograms, codata... what in the name of goodness does co actually *mean* anyway?? Nothing. When mathematicians find a new thing completely unlike an OldThing, but related by some

Re: [Haskell-cafe] Clearly, Haskell is ill-founded

2007-07-10 Thread Creighton Hogg
On 7/9/07, Dan Piponi [EMAIL PROTECTED] wrote: On 7/8/07, Thomas Conway [EMAIL PROTECTED] wrote: The basic claim appears to be that discrete mathematics is a bad foundation for computer science. I suspect the subscribers to this list would beg to disagree. Wearing my tin foil hat for the

Re: [Haskell-cafe] Clearly, Haskell is ill-founded

2007-07-10 Thread Creighton Hogg
On 7/9/07, Conor McBride [EMAIL PROTECTED] wrote: Hi all On 9 Jul 2007, at 06:42, Thomas Conway wrote: I don't know if you saw the following linked off /. http://www.itwire.com.au/content/view/13339/53/ [..] The basic claim appears to be that discrete mathematics is a bad foundation

Re: [Haskell-cafe] Clearly, Haskell is ill-founded

2007-07-10 Thread Dan Piponi
On 7/10/07, Creighton Hogg [EMAIL PROTECTED] wrote: Okay Mr. Piponi, as a math geek I can't let that comment about the web slide without further explanation. Is it just the idea that coalgebras can capture the idea of side affects (a - F a) or is there something more specific that you're

Re: [Haskell-cafe] Clearly, Haskell is ill-founded

2007-07-10 Thread Andrew Coppin
Dan Piponi wrote: First a quick bit of background on algebras. If F is a functor, an F-algebra is an arrow FX-X. For example if we choose FX = 1+X+X^2 (using + to mean disjoint union) then an F-algebra is a function 1+X+X^2-X. The 1-X part just picks out a constant, the image of 1. The X^2-X

Re: [Haskell-cafe] Clearly, Haskell is ill-founded

2007-07-10 Thread Andrew Coppin
Stefan O'Rear wrote: On Tue, Jul 10, 2007 at 08:08:52PM +0100, Andrew Coppin wrote: Erm... Wait a sec... coroutines, comonads, coprograms, codata... what in the name of goodness does co actually *mean* anyway?? Nothing. When mathematicians find a new thing completely unlike an

Re: [Haskell-cafe] Clearly, Haskell is ill-founded

2007-07-10 Thread Dan Piponi
On 7/10/07, Andrew Coppin [EMAIL PROTECTED] wrote: Stefan O'Rear wrote: On Tue, Jul 10, 2007 at 08:08:52PM +0100, Andrew Coppin wrote: Erm... Wait a sec... coroutines, comonads, coprograms, codata... what in the name of goodness does co actually *mean* anyway?? Nothing. When mathematicians

Re: [Haskell-cafe] Clearly, Haskell is ill-founded

2007-07-10 Thread Andrew Coppin
Dan Piponi wrote: (I got lost somewhere with the levels of quotation there...) It's more specific than this. Coalgebra, cohomology, codata, comonads and so on derive their name from the fact that they can be described using category theory. In category theory you draw lots of diagrams with

Re: [Haskell-cafe] Clearly, Haskell is ill-founded

2007-07-10 Thread Dan Piponi
On 7/10/07, Andrew Coppin [EMAIL PROTECTED] wrote: Sounds a lot like the Boolean duality principle. That is, in fact, very closely related. -- Dan ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org

Re: [Haskell-cafe] Clearly, Haskell is ill-founded

2007-07-10 Thread ajb
G'day all. Quoting Stefan O'Rear [EMAIL PROTECTED]: Data can only be constructed using constructors, but can be deconstructed [...] You mean nstructed. Now if you'l excuse me, I'm off to write some de. Cheers, Andrew Bromage ___ Haskell-Cafe

Re: [Haskell-cafe] Clearly, Haskell is ill-founded

2007-07-09 Thread Daniel McAllansmith
On Monday 09 July 2007 17:42, Thomas Conway wrote: I don't know if you saw the following linked off /. http://www.itwire.com.au/content/view/13339/53/ An amazon link for the book is here: http://www.amazon.com/Computer-Science-Reconsidered-Invocation-Expression/d p/0471798142 The basic

Re: [Haskell-cafe] Clearly, Haskell is ill-founded

2007-07-09 Thread Stephen Forrest
On 7/9/07, Daniel McAllansmith [EMAIL PROTECTED] wrote: I wouldn't want to comment on the validity of his claim, maybe he's wrong, or maybe he's... well, anyway... what I will say is I got a chuckle out of the 'Citations' that Amazon lists. As amusing as that thought is, it seems that this is

Re: [Haskell-cafe] Clearly, Haskell is ill-founded

2007-07-09 Thread Puneet
It looks like Amazon's citation database is mistakenly using the index for the book _Beating Depression_ by John Rush (Toronto: John Wiley Sons, Canada Ltd., 1983). Yes it is so. Amazon.com mistakenly thinks that the given book is a new edition of the book titled beating depression. Amazon

Re: [Haskell-cafe] Clearly, Haskell is ill-founded

2007-07-09 Thread Conor McBride
Hi all On 9 Jul 2007, at 06:42, Thomas Conway wrote: I don't know if you saw the following linked off /. http://www.itwire.com.au/content/view/13339/53/ [..] The basic claim appears to be that discrete mathematics is a bad foundation for computer science. I suspect the subscribers to this

Re: [Haskell-cafe] Clearly, Haskell is ill-founded

2007-07-09 Thread Asumu Takikawa
On 15:42 Mon 09 Jul , Thomas Conway wrote: I don't know if you saw the following linked off /. http://www.itwire.com.au/content/view/13339/53/ I read that earlier and his comments, such as This concept of 'process expression' is, he says, a common thread running through the various

Re: [Haskell-cafe] Clearly, Haskell is ill-founded

2007-07-08 Thread Donald Bruce Stewart
drtomc: I don't know if you saw the following linked off /. http://www.itwire.com.au/content/view/13339/53/ An amazon link for the book is here: http://www.amazon.com/Computer-Science-Reconsidered-Invocation-Expression/dp/0471798142 The basic claim appears to be that discrete