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  • ISOLUTION B.V.
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druud/README.md

Ruud H.G. van Tol

Mathematics and programming, with a proof assistant at hand.

  • Collatz, but stop at the drop: two papers and their Lean 4 / Mathlib formalization. The question is not whether every start reaches 1, but whether every x > 1 eventually falls below itself.
  • rud1: a mostly functional programming language inspired by pari/gp, with a Lean 4 prototype as its reference.

Netherlands · ISOLUTION B.V.

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  1. Collatz-but-stop-at-the-drop Collatz-but-stop-at-the-drop Public

    Collatz, but stop at the drop: Lean 4 / Mathlib formalization of the papers

    Python