From: Miles Gould <miles@assyrian.org.uk>
To: PETER EASTHOPE <peasthope@shaw.ca, categories@mta.ca
Subject: Re: Horizontal line notation.
Date: Mon, 16 Mar 2009 11:45:26 +0000 [thread overview]
Message-ID: <E1LjMWg-0001jP-Br@mailserv.mta.ca> (raw)
On Sun, Mar 15, 2009 at 07:35:37AM -0800, PETER EASTHOPE wrote:
> Lawvere & Schanuel use a horizontal line
> notation. Page 326 for example.
>
> X --> 1^T
> ---------
> TxX --> 1
>
> This is unfamiliar. Does the line have a
> name? How is it read?
It's read "(X --> 1^T)" is the transpose of (TxX --> 1)", but I'm not
aware of a name for the line itself. This is reasonably standard
notation, by the way.
Miles
--
Besides, don't think aircraft carrier, think mecha. The type
system is a great amplifier of careful reasoning and propagator of
intent. If somebody starts muttering about bondage, just tell them
"those straps are there so the servos can follow *me*".
-- skew, on #haskell
next reply other threads:[~2009-03-16 11:45 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-16 11:45 Miles Gould [this message]
-- strict thread matches above, loose matches on Subject: below --
2009-03-19 22:08 Vaughan Pratt
2009-03-18 17:26 Mike Stay
2009-03-17 19:36 Toby Bartels
2009-03-17 14:59 PETER EASTHOPE
2009-03-17 12:28 Jeff Egger
2009-03-17 2:15 David Ellerman
2009-03-15 15:35 PETER EASTHOPE
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