# [NTG-context] Calligraphic letters in Mark IV

Sun Jan 24 22:17:32 CET 2010

On Sun, 24 Jan 2010, Hans Hagen wrote:

> On 22-1-2010 19:20, Wolfgang Schuster wrote:
>
>> \unexpanded\def\calligraphic{\ifmmode\expandafter\mathscript \fi}
>>
>> to math-ini.mkiv?
>
> probably something
>
> \unexpanded\def\calligraphic{\groupedcommand{...
>
> then but lets see what aditya thinks of it ...

I think that we should have \calligraphic for text calligraphic fonts
only. For math, plain tex had \cal as a font switch, MkIV has \mathscript
and \mathcal. I am not sure that we need another font switch in math.

I know, that in mkii \calligraphic is available in math mode, but I did
not like that either. Since you are asking for my opinion, I think that it
should go :-). For backward compatibility, we can add
appropriate definition of \calligraphic to m-mkii module.

While we are at this topic, I think that we should change the definitions
of \mathbf, \mathtf, etc from being a font switch to being a grouped
command (to be more in tune with ams convetions). So, in math-ini.mkiv we
can have

diff --git a/math-ini.mkiv b/math-ini.mkiv
index 17b0205..65bd43c 100644
--- a/math-ini.mkiv
+++ b/math-ini.mkiv
@@ -72,23 +72,27 @@
\unexpanded\def\mathfraktur   {\setmathalphabet{fraktur}}
\unexpanded\def\mathblackboard{\setmathalphabet{blackboard}}

-\unexpanded\def\mathrm{\setmathattribute{rm}{tf}}
-\unexpanded\def\mathss{\setmathattribute{ss}{tf}}
-\unexpanded\def\mathtt{\setmathattribute{tt}{tf}}
-
-\unexpanded\def\mathtf{\setmathstyle{tf}}
-\unexpanded\def\mathbf{\setmathstyle{bf}}
-\unexpanded\def\mathsl{\setmathstyle{sl}}
-\unexpanded\def\mathit{\setmathstyle{it}}
-\unexpanded\def\mathbs{\setmathstyle{bs}}
-\unexpanded\def\mathbi{\setmathstyle{bi}}
-
-\let\tfmath\mathtf % maybe a grouped command
-\let\bfmath\mathbf
-\let\slmath\mathsl
-\let\itmath\mathit
-\let\bsmath\mathbs
-\let\bimath\mathbi
+\unexpanded\def\rmmath{\setmathattribute{rm}{tf}}
+\unexpanded\def\ssmath{\setmathattribute{ss}{tf}}
+\unexpanded\def\ttmath{\setmathattribute{tt}{tf}}
+
+\unexpanded\def\tfmath{\setmathstyle{tf}}
+\unexpanded\def\bfmath{\setmathstyle{bf}}
+\unexpanded\def\slmath{\setmathstyle{sl}}
+\unexpanded\def\itmath{\setmathstyle{it}}
+\unexpanded\def\bsmath{\setmathstyle{bs}}
+\unexpanded\def\bimath{\setmathstyle{bi}}
+
+\unexpanded\def\mathrm{\groupedcommand{\rmmath}{}}
+\unexpanded\def\mathss{\groupedcommand{\ssmath}{}}
+\unexpanded\def\mathtt{\groupedcommand{\ttmath}{}}
+
+\unexpanded\def\mathtf{\groupedcommand{\tfmath}{}}
+\unexpanded\def\mathbf{\groupedcommand{\bfmath}{}}
+\unexpanded\def\mathsl{\groupedcommand{\slmath}{}}
+\unexpanded\def\mathit{\groupedcommand{\itmath}{}}
+\unexpanded\def\mathbs{\groupedcommand{\bsmath}{}}
+\unexpanded\def\mathbi{\groupedcommand{\bimath}{}}

\let\Bbb\mathblackboard

What do you think?