> Is there any other common operator you would recommend instead? Yes, wedge product[0], written as tilde (~)[1]: "a"~("b"~"c") = "abc" = ("a"~"b")~"c" # as

> Is there any other common operator you would recommend instead? Yes, wedge product[0], written as tilde (~)[1]: "a"~("b"~"c") = "abc" = ("a"~"b")~"c" # associative "a"~"a"~"a" = "aaa" = "a"^3 # exponentiates with repeat -"abc" = "cba" # (with - as string reverse) "ab"~"cd" = -(-"cd" ~ -"ab") # weakly[2] anticommutative If you generalize to regular expressions, you can get some more milage out of + as alternation and * as intersection. 0: https://en.wikipedia.org/wiki/Wedge_product https://en.wikipedia.org/wiki/Wedge_product 1: Not caret (^), because that makes a good exponentiate operator. 2: # vector wedge product is strongly anticommutative u~v = -(v~u) = -(-v~-u) # with vector negation