[Axiom-developer] [#8 (Savannah bug #9297) output misses some parenthesis]

[Bill Page]

++added:
summation(i^2^(d-c+1),i=a..b)

??changed:
-sum(operator(f)(i)+1,i=1..n)^2
sum(operator(f)(i),i=1..n)+1
sum(operator(f)(i)+1,i=1..n)^3

??changed:
-
Expressions (1) and (2) above appear to be indistinquishable
in the native Axiom text mode output.

In expressions (3) and (4) the scope of the summation is
ambiguous in both the text mode and formatted outputs.

A proposed [patch to combfunc.spad] adds parenthesis to the
sum and product outputForm::

  ddprod l ==
  -      prod(summand(l)::O, third(l)::O = fourth(l)::O, fourth(rest l)::O)
  +      paren(prod(summand(l)::O, third(l)::O = fourth(l)::O, fourth(rest 
l)::O))
 
  ddsum l ==
  -      sum(summand(l)::O, third(l)::O = fourth(l)::O, fourth(rest l)::O)
  +      paren(sum(summand(l)::O, third(l)::O = fourth(l)::O, fourth(rest 
l)::O))



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forwarded from http://page.axiom-developer.org/zope/mathaction/address@hidden