Re:Pi in the Sky, Artists Fill the SF Bay Area With w/ first...
by jerf on Friday September 14, 2012 @10:20PM
(#4525007)
I'd refer you back to philh's answer. You can do that and it isn't "wrong", but it is surprisingly uninteresting, as compared to a discussion of irrational or negative or imaginary bases.
"a numeral system with pi as basis" could be (base pi)pi, where pi =-> '1' and pipi -> '10' and unity -> '0.1'.