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Results tagged with lean4
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user 555
Lean 4 is the latest major version of the Lean theorem prover by Microsoft Research. Use this tag for questions specific to Lean 4; if it's about Lean in general, use the tag (lean).
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Are there computable functions which can't be expressed in Lean?
Since Lean programs always terminate, it cannot be Turing-complete. In particular, one specific computable-but-not-Lean-computable problem is the problem of evaluating computable Lean expressions (i.e …
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