# Page Not Found

The URL `files/CAgb0aaeQJ8dOG1VEwpe` does not exist. This page may have been moved, renamed, or deleted.

## Suggested Pages

You may be looking for one of the following:
- [常微分方程](https://control.xym.work/1_basic_math/4_ode.md)
- [线性代数](https://control.xym.work/1_basic_math/1_linear_algebra.md)
- [离散系统的校正](https://control.xym.work/2_control/4_discrete/3-li-san-jiao-zheng.md)
- [计算机离散控制系统](https://control.xym.work/2_control/4_discrete.md)
- [机器人开发](https://control.xym.work/5_robot/3_develop.md)

## How to find the correct page

If the exact page cannot be found, you can still retrieve the information using the documentation query interface.

### Option 1 — Ask a question (recommended)

Perform an HTTP GET request on the documentation index with the `ask` parameter:

```
GET https://control.xym.work/1_basic_math/4_ode.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

### Option 2 — Browse the documentation index

Full index: https://control.xym.work/sitemap.md

Use this to discover valid page paths or navigate the documentation structure.

### Option 3 — Retrieve the full documentation corpus

Full export: https://control.xym.work/llms-full.txt

Use this to access all content at once and perform your own parsing or retrieval. It will be more expensive.

## Tips for requesting documentation

Prefer `.md` URLs for structured content, append `.md` to URLs (e.g., `/1_basic_math/4_ode.md`).

You may also use `Accept: text/markdown` header for content negotiation.