Re: [FRIAM] Rosen, and mapping

2008-08-10 Thread Phil Henshaw
t; Behalf Of Marcus G. Daniels > Sent: Sunday, August 10, 2008 11:51 AM > To: The Friday Morning Applied Complexity Coffee Group > Subject: Re: [FRIAM] Rosen, and mapping > > One contribution from category theory for dealing with stateful systems > (like organisms) is the Monad

Re: [FRIAM] Rosen, and mapping

2008-08-10 Thread Ken Lloyd
> [mailto:[EMAIL PROTECTED] On Behalf Of Carl Tollander > Sent: Sunday, August 10, 2008 10:14 AM > To: The Friday Morning Applied Complexity Coffee Group > Subject: Re: [FRIAM] Rosen, and mapping > > In that same vein I also recommend at least the first few > pages of this tal

Re: [FRIAM] Rosen, and mapping

2008-08-10 Thread Carl Tollander
s, logic > and programming. > > Ken > > *From:* [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] *On Behalf Of *Nicholas Thompson > *Sent:* Saturday, August 09, 2008 8:58 PM > *To:* friam@redfish.com > *Subject:* [FRIAM] Rosen, and mapping > >

Re: [FRIAM] Rosen, and mapping

2008-08-10 Thread Marcus G. Daniels
One contribution from category theory for dealing with stateful systems (like organisms) is the Monad. Monads provide a way to compose together computations into larger ones such that an order of execution can be enforced *and* such that the state doesn't need to be passed around from amongst t

Re: [FRIAM] Rosen, and mapping

2008-08-10 Thread Ken Lloyd
nday, August 10, 2008 7:24 AM > To: The Friday Morning Applied Complexity Coffee Group > Subject: Re: [FRIAM] Rosen, and mapping > > I agree with Russell and Carl, but a couple of mathematical > examples might help. > > Consider the mapping (i.e. arrow) from a pair of facto

Re: [FRIAM] Rosen, and mapping

2008-08-10 Thread Roger Frye
I agree with Russell and Carl, but a couple of mathematical examples might help. Consider the mapping (i.e. arrow) from a pair of factors to their product. There is not a unique reverse mapping from the product to the factors. Also, if the factors are positive, consider the mapping from

Re: [FRIAM] Rosen, and mapping

2008-08-10 Thread Phil Henshaw
to arrange a correspondence between the two? From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Nicholas Thompson Sent: Saturday, August 09, 2008 10:58 PM To: friam@redfish.com Subject: [FRIAM] Rosen, and mapping Roseners, and anybody else vaguely interested in category theory

Re: [FRIAM] Rosen, and mapping

2008-08-09 Thread Carl Tollander
Agreed. Nobody convinced me that Rosen was ever really doing category theory anyhow. If all you need is the category Set, why mobilize algebraic topology? Leave the hyper-dimensional warp drive in the garage. Russell Standish wrote: > The standard language of maps (aka functions) over sets

Re: [FRIAM] Rosen, and mapping

2008-08-09 Thread Ken Lloyd
@redfish.com Subject: [FRIAM] Rosen, and mapping Roseners, and anybody else vaguely interested in category theory. Rosen seems to be interested in situations in which A maps to B but not all the values in B can be generated by the mapping. this is a lot like the Intension and the Extension

Re: [FRIAM] Rosen, and mapping

2008-08-09 Thread Russell Standish
The standard language of maps (aka functions) over sets will give you want you want. Category theory is not needed. On Sat, Aug 09, 2008 at 08:58:02PM -0600, Nicholas Thompson wrote: > Roseners, and anybody else vaguely interested in category theory. > > Rosen seems to be interested in situatio

[FRIAM] Rosen, and mapping

2008-08-09 Thread Nicholas Thompson
Roseners, and anybody else vaguely interested in category theory. Rosen seems to be interested in situations in which A maps to B but not all the values in B can be generated by the mapping. this is a lot like the Intension and the Extension of an utterance. I say with assurance that Mrs.