QuoteRef: georJ12_1977 ;;43 parametric expression: expression (pl,...,pn) as pl,...,pn in (rangel,...rangen) results in array which is expression applied to cartesian product of ranges eg I as I in 0..8 is APL's .enumerate.8

QuoteRef: georJ12_1977 ;;45 in parametric expression. special symbols to combine by rows or columns

47 ;;Quote: no practical problems for parametric operations which return an array of values for each value of parameters