lew (08/12/82)
Of course, the isolated spinning mass in an otherwise empty universe is unrealizable so the question whether it is conceivable is moot. My understanding (such as it is) of General Relativity makes me think that an empty universe is not a solution of Einstein's equation and is therefore inconceivable within General Relativity. I recall a quote from the Misner et al book, "Gravitation", which said: "Current observations indicate that the universe is rotating very little, if at all, this may be taken as experimental verification of Mach's principle." A recent "Science News" reports that radio polarimetry observations do indicate a net rotation of the universe. The report also commented that optical surveys have not shown this. Lew Mammel, Jr. - BTL Indian Hill
lew (08/12/82)
Come to think of it, I guess infinite flat space-time is a trivial solution to Einstein's equation. This lends credence to uwvax!doug's comments. I guess I've covered all bases on this issue! Lew Mammel, Jr. - BTL Indian Hill