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sympy__sympy-24152

Based on the issue description, I have enough information to create the patch. The issue describes:

  • Skills
  • AI research
  • 2

What it does and how to use it

A skill that teaches Claude Code to do ai research tasks well. It is packaged knowledge the model uses whenever it is relevant.

  1. Install the skill (command above).
  2. In Claude Code, describe what you need - the skill turns on by itself when the context fits.
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Install (Claude Code)

mkdir -p .claude/skills/sympy-sympy-24152 && curl -fsSL https://doutorai.pt/data/lib/skills__sympy-sympy-24152.md -o .claude/skills/sympy-sympy-24152/SKILL.md

Paste this command into the terminal, in your project folder, and the component installs automatically.

Content

Based on the issue description, I have enough information to create the patch. The issue describes:

1. The problem: `_eval_expand_tensorproduct()` fails when the creation of a TensorProduct object returns commutative (scalar) factors up front, returning `Mul(c_factors, TensorProduct(..))` instead of just `TensorProduct`.

2. The fix: Split off commutative (scalar) factors from the `tp` returned, then check if the non-commutative part contains a TensorProduct that needs recursive expansion.

Here's the patch:

--- a/sympy/physics/quantum/tensorproduct.py
+++ b/sympy/physics/quantum/tensorprodu

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