There’s a new option in Applications → Defaults to select your default PDF viewer, and we’ve slightly tweaked the icon for Background Activity permissions to be a bit cuter.
At the Lean FRO, Kim Morrison, a Senior Research Software Engineer, recently ran an experiment that went well beyond our expectations. An AI agent converted zlib, a widely used C compression library embedded in countless systems, to Lean, with minimal human guidance. No special tooling was built. It was Claude, a general-purpose AI, with no special training for theorem proving, out of the box. The workflow had four steps. First, the AI produced a clean, readable Lean implementation of the zlib compression format, including the DEFLATE algorithm at its core. Second, the Lean version passed the library’s existing test suite, confirming behavioral equivalence. Third, key properties were stated and proved, not as tests, but as mathematical theorems. The capstone theorem:
And it didn’t work for newer Python versions, but people were still relying on some of the functionality. I think XPath was actually added to XML and XSLT was added to the xmlplus package.。Safew下载对此有专业解读
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