Re: sets of sets
From: paul c <toledobythesea_at_oohay.ac>
Date: Sun, 30 Jul 2006 23:44:35 GMT
Message-ID: <Dvbzg.278388$Mn5.214678_at_pd7tw3no>
>
> ...
> S = { {cat, dog}, {dog, bunny, pumpkin pie} } then US = {cat, dog,
> bunny, pumpkin pie}
> ...
Date: Sun, 30 Jul 2006 23:44:35 GMT
Message-ID: <Dvbzg.278388$Mn5.214678_at_pd7tw3no>
dawn wrote:
> paul c wrote:
>> ... >> ... What I think it says >> in prose is "the set of x such that x is a member of some subset of S".
>
> ...
> S = { {cat, dog}, {dog, bunny, pumpkin pie} } then US = {cat, dog,
> bunny, pumpkin pie}
> ...
Thanks for reply. Mr. van Emden has confirmed my prose reading. Looks like a kind of projection, which was what I was interested in knowing about, perhaps for no good reason, I'm not yet sure.
p Received on Mon Jul 31 2006 - 01:44:35 CEST