https://jaalonso.github.io/calculemus/enContents © 2026 <a href="mailto:">José A. Alonso</a> <a rel="license" href="https://creativecommons.org/licenses/by-nc-sa/4.0/"> <img alt="Creative Commons License BY-NC-SA" style="border-width:0; margin-bottom:12px;" src="https://i.creativecommons.org/l/by-nc-sa/4.0/88x31.png"></a>Thu, 15 Oct 2026 06:09:25 GMTNikola (getnikola.com)http://blogs.law.harvard.edu/tech/rsshttps://jaalonso.github.io/calculemus/en/posts/2025/01/21-praeclarum_theoremaen/José A. Alonso<div><hr> <p>Prove with Lean4 and with Isabelle/HOL the <a href="https://tinyurl.com/25yt3ef9">Praeclarum theorema</a> of Leibniz: \[ (p ⟶ q) ∧ (r ⟶ s) ⟶ ((p ∧ r) ⟶ (q ∧ s)) \]</p> <hr> <p><a href="https://jaalonso.github.io/calculemus/en/posts/2025/01/21-praeclarum_theoremaen/">Read more…</a> (2 min remaining to read)</p></div>https://jaalonso.github.io/calculemus/en/posts/2025/01/21-praeclarum_theoremaen/Tue, 21 Jan 2025 04:00:00 GMT