# sympy__sympy-13647

> The issue is in the _eval_col_insert method in sympy/matrices/common.py. Looking at similar issues and the sympy codebase structure, the bug is that when c

- Source: https://doutorai.pt/en/components/skills__sympy-sympy-13647
- Type: Skills
- Category: AI research
- Downloads: 0
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An open-source community component, curated and adapted by Doutor AI.

## 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.
3. No commands to memorize: you talk in plain language and the skill does the rest.

## Install (Claude Code)

```bash
mkdir -p .claude/skills/sympy-sympy-13647 && curl -fsSL https://doutorai.pt/data/lib/skills__sympy-sympy-13647.md -o .claude/skills/sympy-sympy-13647/SKILL.md
```

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

## Content

```
Based on the problem statement and hint, I can understand the issue:

1. The `col_insert` method inserts columns into a matrix
2. There's a bug where the position calculation is wrong in the `_eval_col_insert` method
3. According to the hint, `pos` shouldn't be at line 89

Looking at the GitHub issue and the problem description:
- When inserting columns at position 3 in a 6x6 identity matrix, the resulting matrix incorrectly shifts part of the original matrix
- The 3x3 identity portion that should be at the bottom-right is incorrectly placed at the top-right

The issue is in the `_eval_col_ins

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```

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