the state of Austria usually buys its police cars from Porsche (the dealer not the carmaker) guess, that doesn't count. but Austria had Porsches (some of them 911) in the 60s
Yes, you are correct. As the SI brochure states: "Compound prefix symbols, i.e. prefix symbols formed by the juxtaposition of two or more
prefix symbols, are not permitted."
Unfortunately, almost no one uses SI units and/or prefixes correctly.
Meh, units should be used at the convenience of us, they are all arbitrarily defined to start with. We still use lots of non-si units, like AUs, minutes seconds and hours, degrees and arc units, or whatever else. Conversion is easier than ever today so I think units should be adapted to the application and use more fractional units when appropriate.
if you take the spectral theorem, for example, there is a direct connection between linear algebra and functional analysis, basically it's linear algebra in infinite dimensions
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