A mysterious person who left everything here.https://mr-errion.github.io/en/enhttps://mr-errion.github.io/en/posts/ai-for-physics-study/https://mr-errion.github.io/en/posts/ai-for-physics-study/Using stripe order in the two-dimensional Hubbard model as an example, connect the current Codex Skills into a condensed-matter research workflow, from choosing a question and reviewing literature to derivations, numerical experiments, paper delivery, and reusable procedures.Mon, 31 Aug 2026 00:00:00 GMThttps://mr-errion.github.io/en/posts/symplectic-geometry/https://mr-errion.github.io/en/posts/symplectic-geometry/Starting from Hamilton’s equations, understand why the symplectic form captures the structure of classical dynamics more directly than coordinates.Sun, 30 Aug 2026 00:00:00 GMThttps://mr-errion.github.io/en/posts/hamilton-jacobi/https://mr-errion.github.io/en/posts/hamilton-jacobi/View the action as a generating function and understand how families of classical trajectories become geometric objects in phase space.Sat, 29 Aug 2026 00:00:00 GMThttps://mr-errion.github.io/en/posts/moment-map-noether/https://mr-errion.github.io/en/posts/moment-map-noether/How symmetries generate conserved quantities on symplectic manifolds, and why Lie group actions provide the right framework.Fri, 28 Aug 2026 00:00:00 GMThttps://mr-errion.github.io/en/posts/path-integral/https://mr-errion.github.io/en/posts/path-integral/How the stationary-phase approximation reorganizes quantum amplitudes around classical trajectories.Tue, 18 Aug 2026 00:00:00 GMThttps://mr-errion.github.io/en/posts/ising-criticality/https://mr-errion.github.io/en/posts/ising-criticality/From correlation length to universality, build geometric intuition for continuous phase transitions.Wed, 05 Aug 2026 00:00:00 GMT