Hi,
I am confused why the following definition does not work as expected.
\def\PM{\dosingleempty\doPM}
\def\doPM[#1]{\iffirstargument P_{M_{#1}}
\else P_{M_t}\fi}
\starttext
Why is $\widetilde \PM[T]$ not the same as $\widetilde P_{M_T}$
\stoptext
Can I change the definition so that
$\widetilede \PM$ is same as $\widetilde P_{M_t}$
and
$\widetilede \PM[T]$ is same as $\widetilde P_{M_T}$
Thanks,
Aditya
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