diff --git a/content/AI&DATA/SourceCodeReview/Python Limit Implementation.md b/content/AI&DATA/SourceCodeReview/Python Limit Implementation.md
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index 000000000..3e93ee3ff
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+++ b/content/AI&DATA/SourceCodeReview/Python Limit Implementation.md	
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+
+https://github.com/sympy/sympy/blob/master/sympy/series/limits.py
+