Status: Accepted
Owner: asmeurer
CC: [email protected]
Labels: Type-Enhancement Priority-Medium Printing Polynomial
New issue 2628 by asmeurer: Pretty pint RootSum
http://code.google.com/p/sympy/issues/detail?id=2628
Maple prints its equivalent of RootSum objects as a summation. Here is an
example with the ASCII printer:
integrate(1/(x**5 + x + 1), x);
/
----- 2
\ 1/2
| \ (5 - 4 _R
+ _R ) ln(x - _R)| 2 1/2 (2 x + 1) 3
1/7 | )
---------------------------| - 1/14 ln(x + x + 1) + 5/21 3
arctan(--------------)
| /
2 | 3
| ----- 3
_R - 2 _R |
\_R
= %1 /
3
2
%1 :=
RootOf(_Z
- _Z + 1)
I think we should do this too. Print it as a summation, with the lower
index as _i = RootOf, or even better, write it as _x | _x**3 - _x + 1 = 0.
This is the mathematical notation. For example, see the equation at the
bottom of the page just above the algorithm box on page 54 of Bronstein's
book
(http://books.google.com/books?id=8SAaSd89sSkC&lpg=PA49&pg=PA52#v=onepage&q&f=false).
This would make RootSums way easier to read.
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