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.
中国人民银行数据显示，中国1月末黄金储备报7419万盎司，连续第15个月增持黄金。
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They make up nearly half of all doctors in England, and work across the NHS including in A&E and GP surgeries.
Donald Trump’s likely casus belli for an attack on Iran – which would be the largest US intervention since the Iraq war – is fraught with contradictions, and his top advisers have been left to cover for him as the White House makes the case for intervention.