John Pye wrote:
What's the right string of tools to embed an SVG with alpha-channel
transparency into a LyX document so that I get the alpha channel
appearing right in the end-product PDF file?
Transform your SVG to PDF. Inkscape supports alpha channels in SVG and
in PNG, see
http://wiki.inkscape.org/wiki/index.php/InkscapeFeatures
The new version 0.44 of Inkscape:
http://sourceforge.net/project/showfiles.php?group_id=93438&package_id=99112
comes with a native PDF export, so that the alpha channel should be
included in the PDF. The resulting PDF image can directly be used in LyX
when you use pdflatex to generate the PDF output.
regards Uwe