Lean is the result of over twelve years of continuous development. We designed and built every layer from scratch: the trusted kernel, the compiler, the language server, the IDE, the proof automation. The team is 20 people. The community independently chose Lean: mathematicians, AI researchers, and enterprise engineers, all building on the same platform.
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，这一点在下载安装 谷歌浏览器 开启极速安全的 上网之旅。中也有详细论述
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between. This way, we get the following result:
20 February 2026，更多细节参见91视频