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**To**:*haberg@matematik.su.se, taco.hoekwater@wkap.nl***Subject**:**Re: (hooks) MathML arrow fonts****From**:*vojta@math.berkeley.edu (Paul Vojta)***Date**: Wed, 18 Nov 1998 12:26:29 -0800**Cc**:*math-font-discuss@cogs.susx.ac.uk, vojta@math.berkeley.edu*- Content-Length: 880

> Date: Wed, 18 Nov 1998 12:11:54 +0100 > To: Taco Hoekwater <taco.hoekwater@wkap.nl> > From: Hans Aberg <haberg@matematik.su.se> > Subject: Re: (hooks) MathML arrow fonts > Cc: vojta@math.berkeley.edu (Paul Vojta), math-font-discuss@cogs.susx.ac.uk > > At 09:33 +0100 1998/11/18, Taco Hoekwater wrote: > > PV> \lhook, \rhook (as in AmSTeX) > > > >I intend to add these two, but thanks for reminding me. These are > >essentially building blocks like the arrow tails, yes? > > They are actually defined in PlainTeX, see Knuth's The TeXBook, p 358. He > uses them exclusively to build hooks on arrows. > > I think that Paul Vojta should indicate how he is using them: If used as > binary operations, then they should have separate slots in Unicode. I use them as building blocks for long arrows, etc. I do not use them as binary relations. --Paul Vojta, vojta@math.berkeley.edu

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