# Yuchen Pei

> software engineer and mathematician

**Wikidata**: [Q102434934](https://www.wikidata.org/wiki/Q102434934)  
**Source**: https://4ort.xyz/entity/yuchen-pei

## Summary
Yuchen Pei is a software engineer and mathematician known for their contributions to free software, particularly as a maintainer of tools like Luwak, Hcel, and LibreJS. They are affiliated with the University of Warwick and actively participate in the free software movement.

## Biography
- **Nationality**: United Kingdom
- **Education**: University of Warwick (doctoral advisors: Neil O'Connell, Jonathan Warren)
- **Known for**: Developing and maintaining free software tools for Haskell and Emacs
- **Employer(s)**: Affiliated with the University of Warwick Institute for Employment Research
- **Field(s)**: Software engineering, mathematics, free software activism

## Contributions
Yuchen Pei has made significant contributions to the free software community, particularly in tools for Haskell and Emacs. They developed **Hcel**, a server program for indexing and serving Haskell package source code, and **emacs-hcel**, an Emacs package for exploring Haskell code. In 2022, they created **Luwak**, a text-based web browser for Emacs, which was announced on the GNU Emacs development mailing list. Additionally, Pei serves as a co-maintainer of **LibreJS**, a tool for enforcing free JavaScript standards in web browsers. Their work supports the broader free software movement by providing essential tools for developers and researchers.

## FAQs
### Q: What is Yuchen Pei known for?
A: Yuchen Pei is known for developing free software tools like Luwak, Hcel, and emacs-hcel, as well as maintaining LibreJS.

### Q: Where did Yuchen Pei study?
A: Yuchen Pei studied at the University of Warwick, where they were advised by Neil O'Connell and Jonathan Warren.

### Q: What is Luwak?
A: Luwak is a text-based web browser for Emacs, created by Yuchen Pei in 2022.

### Q: Is Yuchen Pei involved in the free software movement?
A: Yes, they are an associate member of the Free Software Foundation (since 2018) and contribute to free software projects.

## Why They Matter
Yuchen Pei's work in free software tools has enhanced the accessibility and functionality of development environments like Emacs and Haskell. Their contributions, such as Luwak and Hcel, provide developers with powerful, open-source alternatives to proprietary software. By maintaining LibreJS, they help enforce free software principles in web development, ensuring greater user freedom. Their involvement in the Free Software Foundation and academic research further bridges the gap between theoretical mathematics and practical software engineering.

## Notable For
- Developer of **Luwak** (2022), a text-based web browser for Emacs.
- Maintainer of **Hcel** and **LibreJS**, key tools in the free software ecosystem.
- Associate member of the **Free Software Foundation** (since 2018).
- Affiliated with the **University of Warwick Institute for Employment Research**.

## Body
### **Software Development**
- **Luwak**: A text-based web browser for Emacs, released in 2022. It allows users to browse the web directly within Emacs, aligning with free software principles.
- **Hcel**: A server program for indexing and serving Haskell package source code, facilitating easier exploration of Haskell libraries.
- **emacs-hcel**: An Emacs package that integrates with Hcel, enabling developers to navigate Haskell code efficiently.

### **Free Software Activism**
- **LibreJS Maintainer**: Co-maintainer of LibreJS, a tool that blocks non-free JavaScript in web browsers, promoting user freedom.
- **FSF Membership**: Associate member of the Free Software Foundation since 2018, contributing to the advocacy and development of free software.

### **Academic Background**
- **Education**: Studied at the University of Warwick, with doctoral advisors Neil O'Connell and Jonathan Warren.
- **Research**: Affiliated with the University of Warwick Institute for Employment Research, contributing to both software engineering and mathematical research.

## Schema Markup
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## References

1. [GNU's Who](https://www.gnu.org/people/people.html#y)
2. Mathematics Genealogy Project
3. [Source](https://www.fsf.org/licensing/team/#yuchen)