Key points are not available for this paper at this time.
i i Th(~ disposition of lhe parentheses is computed by numberbig the m ull;iplication signs consecutively. If n is divisible /)y 2 k but, not; by 2 kw, then (;he nt,h multiplication sign is 1-),'ecedcd by k right pat'entheses, and followed by k left parentheses. If the lasi, multiplication sign is numbered m, then the entire expression is surrounded by k parentheses, whore 2 k ~" Ill. The extension go negative integral expohen Ls is obvious. The rewritLen expressions are compiled in the normal manner, the equivalent subexpressions being a.tttotnat ically recognized.
Edgar T. Irons (1961) studied this question.