# Re: MathML arrow fonts

• To: Hans Aberg <haberg@matematik.su.se>
• Subject: Re: MathML arrow fonts
• From: Taco Hoekwater <taco.hoekwater@wkap.nl>
• Date: Wed, 18 Nov 1998 09:39:14 +0100 (W. Europe Standard Time)
• Cc: math-font-discuss@cogs.susx.ac.uk, vojta@math.berkeley.edu (Paul Vojta)
• Content-Length: 1080

>>>>> "HA" == Hans Aberg <haberg@matematik.su.se> writes:

HA> At 12:20 -0800 1998/11/17, Paul Vojta wrote:
>> Also, I often use a symbol which I build up as \overset\sim\to\to
>> (as in The isomorphism $f\:X \overset\sim\to\to Y$ \dots'').  I
>> would like to see such a symbol included as well.  (And a
>> left-pointing version of the same.)

HA> In AMS-LaTeX this is $\overset\sim\to$, an arrow --> with a \sim
HA> used as label.

Have a look at chars 105/107. Are these the ones intended?

they are labeled "simrightarrow" and "simleftarrow".

HA> I prefer the variation where the \sim is replaced by a \cong, but
HA> the semantics is the same (isomorphism).

HA>   But I also think one should have such isomorphism arrows, both
HA> right and left pointing, in at least one of the possible
HA> variations. There is also the variation with the \cong or \sim
HA> replaced by an equality, used to indicate that the arrow is the
HA> identity.

Hans, is this char 109? And if it is, I guess we need a left version
as well (meaning it has a fixed semantic)?

Taco