chore(docs): fix LaTeX error Missing or unrecognized delimiter for \left

[zzc0430]

[gemini-code-assist]

Summary of Changes

Hello @zzc0430, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

此拉取请求旨在通过修正文档中一个数学公式的 LaTeX 语法来解决渲染错误。具体来说，它将一个分段函数的定义从可能导致 Missing or unrecognized delimiter for \left 错误的旧语法，更新为标准的 \begin{cases} 环境，从而确保公式能够正确且美观地呈现在文档中，提升了文档的可读性和准确性。

Highlights

• 修复 LaTeX 渲染错误: 此拉取请求解决了文档中一个 LaTeX 渲染错误，具体为 Missing or unrecognized delimiter for \left。
• 更新数学公式语法: 将分段函数表达式的 LaTeX 语法从 \left\{ ... \begin{array}{ll} ... \end{array} \right. 更新为更简洁且正确的 \begin{cases} ... \end{cases}，以确保公式正确显示。

Using Gemini Code Assist

The full guide for Gemini Code Assist can be found on our documentation page, here are some quick tips.

Invoking Gemini

You can request assistance from Gemini at any point by creating a comment using either /gemini <command> or @gemini-code-assist <command>. Below is a summary of the supported commands on the current page.

Feature	Command	Description
Code Review	/gemini review	Performs a code review for the current pull request in its current state.
Pull Request Summary	/gemini summary	Provides a summary of the current pull request in its current state.
Comment	@gemini-code-assist	Responds in comments when explicitly tagged, both in pull request comments and review comments.
Help	/gemini help	Displays a list of available commands.

Customization

To customize Gemini Code Assist for GitHub experience, repository maintainers can create a configuration file and/or provide a custom code review style guide (such as PEP-8 for Python) by creating and adding files to a .gemini/ folder in the base of the repository. Detailed instructions can be found here.

Limitations & Feedback

Gemini Code Assist may make mistakes. Please leave feedback on any instances where its feedback is incorrect or counter productive. You can react with 👍 and 👎 on @gemini-code-assist comments. If you're interested in giving your feedback about your experience with Gemini Code Assist for Github and other Google products, sign up here.

You can also get AI-powered code generation, chat, as well as code reviews directly in the IDE at no cost with the Gemini Code Assist IDE Extension.

Footnotes

1. Review the Privacy Notices, Generative AI Prohibited Use Policy, Terms of Service, and learn how to configure Gemini Code Assist in GitHub here. Gemini can make mistakes, so double check it and use code with caution. ↩

[gemini-code-assist]

Code Review

This pull request fixes a LaTeX rendering error in the documentation. The change replaces the array environment with the more appropriate cases environment for typesetting a piecewise function. This improves the code's readability and robustness, and correctly resolves the rendering issue.