# HG changeset patch
# User Stepan Roucka <[EMAIL PROTECTED]>
# Date 1223675613 -7200
# Node ID 885e35e7f8a2bc03ed74b9189b84055e153038a2
# Parent 8f3fbceae17d9348f66b62257e0f31e5309ea3d5
Fix broken docstrings (#1147)
The patches implementing the rules for simplifying exponentiation
have broken the doctests. The problem was fixed by setting the right
assumptions. In both examples expression of the form 1/(x**a)
needs to be simplified to x**(-a). In the evalf example, the exponent
is summation index, so it is set to integer. The together example
holds only for positive x and real y.
diff --git a/sympy/core/evalf.py b/sympy/core/evalf.py
--- a/sympy/core/evalf.py
+++ b/sympy/core/evalf.py
@@ -1003,7 +1003,7 @@ def N(x, n=15, **options):
Example:
>>> from sympy import Sum, Symbol, oo
- >>> k = Symbol("k")
+ >>> k = Symbol("k", integer=True)
>>> Sum(1/k**k, (k, 1, oo))
Sum(k**(-k), (k, 1, oo))
>>> N(Sum(1/k**k, (k, 1, oo)), 4)
diff --git a/sympy/simplify/simplify.py b/sympy/simplify/simplify.py
--- a/sympy/simplify/simplify.py
+++ b/sympy/simplify/simplify.py
@@ -220,6 +220,8 @@ def together(expr, deep=False):
It also perfect possible to work with symbolic powers or
exponential functions or combinations of both:
+ >>> x = Symbol('x', positive=True)
+ >>> y = Symbol('y', real=True)
>>> together(1/x**y + 1/x**(y-1))
x**(-y)*(1 + x)
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"sympy-patches" group.
To post to this group, send email to sympy-patches@googlegroups.com
To unsubscribe from this group, send email to [EMAIL PROTECTED]
For more options, visit this group at
http://groups.google.com/group/sympy-patches?hl=en
-~----------~----~----~----~------~----~------~--~---
