A new package has been installed on tug.ctan.org and should make its way to your favorite mirror quite soon.
Thank you for the upload, Jim Hefferon
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The following information was provided by the package's contributor.
Name of contribution: extarrows Author's name: Chim Cut Canh Location on CTAN: /macros/latex/contrib/extarrows Summary description: Extensive Arrows License type: lgpl
Announcement text given by the package's contributor: - - ---------------------------------------------------------------------- Arrows Provided (more than xleftarrow, xrightarrow of AMSMATH package)
xlongequal
xLongleftarrow xLongrightarrow xLongleftrightarrow xLeftrightarrow
xlongleftrightarrow xleftrightarrow xlongleftarrow xlongrightarrow
Enjoy! - - ----------------------------------------------------------------------
You can have a look at the package at http://tug.ctan.org/tex-archive/macros/latex/contrib/extarrows although you may get a better network connection by visiting a mirror of CTAN that is near to you; see http://www.ctan.org/tex-archive/README.mirrors