Money (fiat value) as an econophysical dimension, with currencies the given units of measure and exchange rates the interconversion ratios with bid-asked spreads the ratios' associated uncertainties. The interconversion ratios & uncertainties are dynamic rather than internal system characteristics.
* ( atsign other, See the need for concretable prototypes that then are further elaborable, and each elaboration just works as a distinct concrete leaf type? ) * On Thursday, February 18, 2016 at 12:26:32 AM UTC-5, Eric Forgy wrote: > > This is cool (Unitful.jl and SIUnits.jl). I imagine similar work can be > done for currencies? >
