UCWTeX: \vecoverrightarrow
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@ -54,3 +54,11 @@
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\def\unparskip{\vskip-\parskip}
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\catcode`@=11
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\def\vecoverrightarrow#1{\vbox{\m@th\ialign{##\crcr
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\vecrightarrowfill\crcr\noalign{\kern-\p@\kern 0.09em\nointerlineskip}
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$\hfil\displaystyle{#1\,}\hfil$\crcr}}}
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\def\vecrightarrowfill{$\settextsize{5}\m@th\smash-\mkern-7mu%
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\cleaders\hbox{$\mkern-2mu\smash-\mkern-2mu$}\hfill
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\settextsize{5}\mkern-7mu\mathord\rightarrow$}
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\catcode`@=12
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