[NTG-context] The \frac macro.

Knuth defines a macro for simple fractions such as 3/4 etc. and calls it \frac: \def\frac#1/#2{\leavevmode \kern.1em \raise .5ex \hbox{\the\scriptfont0 #1}% \kern-.1em $/$% \kern -.15em \lower .25ex \hbox{\the\scriptfont0 #2}}% The call is e.g., \frac 3/4. This works fine in Context. However if I undefine the Knuth macro and still use the same \frac call I don't get an error message but the results are quite different. I get both a stroke and a bar between the 3 and the 4. Is there another macro in Context called \frac and if so how is it called? -- John Culleton Able Indexing and Typesetting Precision typesetting (tm) at reasonable cost. Satisfaction guaranteed. http://wexfordpress.com