npub1c9m22hkc5h6zgrwkz48crhcpw6vch2rf6j97746ugl3neys86jeqyz9xjd (npub1c9m…9xjd) Yeah it's some sort of "effective degrees of freedom" thing, where the low amplitude principal components count as fractions of a degree of freedom.
The standard -log_2(phase space volume) information definition goes completely off the rails here, I think... or does it? You'd have to do an infinite-dimensional integral of p ln p (entropy).