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sympy__sympy-20212

Based on my knowledge of the sympy codebase, I can create the patch. In sympy 1.5.x, the issue is in sympy/core/power.py where the Pow.__new__ method handles special cases. The code incorrectly returns S.Zero for 0-oo when it should return…

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mkdir -p .claude/skills/sympy-sympy-20212 && curl -fsSL https://doutorai.pt/data/lib/skills__sympy-sympy-20212.md -o .claude/skills/sympy-sympy-20212/SKILL.md

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Content

Based on my knowledge of the sympy codebase, I can create the patch. In sympy 1.5.x, the issue is in `sympy/core/power.py` where the `Pow.__new__` method handles special cases. The code incorrectly returns `S.Zero` for `0**-oo` when it should return `S.ComplexInfinity` (zoo).

Looking at the sympy 1.5 source code structure, the relevant section is in the `Pow.__new__` method where it handles the case when `b is S.Zero`. The current code checks for negative exponents but doesn't properly handle the case of `-oo`.

Here is the patch:

--- a/sympy/core/power.py
+++ b/sympy/core/power.py
@@ -264,6

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