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**To**:*math-font-discuss@cogs.susx.ac.uk***Subject**:**Re: Math Arrows and Harpoons****From**:*Hans Aberg <haberg@matematik.su.se>***Date**: Fri, 13 Nov 1998 14:29:59 +0100**Cc**:*Taco Hoekwater <taco.hoekwater@wkap.nl>*- Content-Length: 1434

At 13:13 +0100 1998/11/13, Taco Hoekwater wrote: > HA> I think this is the problem with treating such symbols as > HA> characters and putting them into a character font: One should > HA> have some more general underlying mechanism describing them. > >This is true, but does not apply to Unicode character tables. The >idea is: every specific currently used *meaning* should have a >character/glyph pair to go with it. Sure the font will contain some >"build it yourself" characters, but these cannot be submitted to >Unicode for precisely the above reason. The Unicode idea with "a character = a meaning" works well with (human) languages, as these (nowadays by agreement) use a fixed number of characters. But it breaks down in mathematics, where a component of the character is often a component of the meaning. Even though the input from Unicode of a new set of math symbols formerly not available is laudable, Unicode cannot be expected to form a basis for providing all the symbols needed in mathematics; arrows is a very good example of this. Therefore, I think the best one can hope for is making a font that contains the Unicode symbols, but otherwise is extended in a way useful to real mathematics. Hans Aberg * Email: Hans Aberg <mailto:haberg@member.ams.org> * Home Page: <http://www.matematik.su.se/~haberg/> * AMS member listing: <http://www.ams.org/cml/>

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