Hi Hongwen Qiu,
It was the same others opentype math fonts
example:
\usetypescript[cambria]
\switchtobodyfont[cambria,10pt]
\starttext
\startformula
\sqrt{abcde}
\stopformula
\stoptext
\usetypescript[euler]
\switchtobodyfont[euler,10pt]
\starttext
\startformula
\sqrt{abcde}
\stopformula
\stoptext
\starttypescript [math] [asana] [name]
\definefontsynonym [MathRoman] [name:Asana-Math][features=math\mathsizesuffix]
\stoptypescript
\switchtobodyfont[asana,10pt]
\starttext
\startformula
\sqrt{abcde}
\stopformula
\stoptext
--
Best regards,
Ze
在 2010年9月14日 上午11:35，Hongwen Qiu
The \sqrt is not work properly in Mkiv. The following is the minimal example, and the result is attached \setupbodyfont[xits] \starttext \startformula \sqrt{abcde} \stopformula \stoptext
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