| Dec 30, 2023 | The Best Way to Write Math Notes |
| Dec 21, 2023 | Introduction to Higher Form Symmetry |
| Dec 20, 2023 | Notes on Kontsevich |
| Dec 20, 2023 | Note on Hamiltonian Truncation |
| Dec 10, 2023 | 罗伯特议事规则 |
| Dec 7, 2023 | Analytic Structure |
| Dec 6, 2023 | Introduction to Transseries Lecture 2 |
| Dec 6, 2023 | Introduction to Transseries Lecture 1 |
| Dec 3, 2023 | Homotopy-and-Chern-Forms |
| Nov 18, 2023 | Higher Homotopy Groups |
| Nov 18, 2023 | Homotopy, Extension, and some topology of SU(N) |
| Nov 18, 2023 | Categorical Equivalence and the Renormalization Group |
| Nov 16, 2023 | Curvature and Winding Number |
| Oct 31, 2023 | Note on Numerical Methods in Solving ODE |
| Oct 30, 2023 | The Fundamental Group and Covering Spaces |
| Oct 29, 2023 | Bi-invariant Forms on Compact Groups |
| Oct 26, 2023 | The Poincare Duality |
| Oct 23, 2023 | Noether's Principal |
| Oct 9, 2023 | Lecture Notes on Mathematics in Economics |
| Sep 26, 2023 | Note of Nonlinear Quantization |
| Sep 25, 2023 | Electrodynamics in Terms of Differential Forms |
| Sep 21, 2023 | The Dirac Equation |
| Sep 18, 2023 | Introduction to Higher Form Symmetry |
| Sep 2, 2023 | Connections in Associated Bundles |
| Aug 27, 2023 | Associated bundles |
| Aug 23, 2023 | Connections in Principal Bundles |
| Aug 19, 2023 | 韩非子摘 |
| Jul 28, 2023 | Line Bundle, Topological Quantization and Berry Phase |
| Jul 20, 2023 | Gauss-Bonnet Theorem and Index Theorem |
| Jul 18, 2023 | Mikhail Bakunin |
| Jul 17, 2023 | 历史笔记若干 |
| Jul 14, 2023 | Bundles and Coset Spaces |
| Jul 9, 2023 | Fiber Bundles and Principal Bundles |
| Jul 7, 2023 | Quartic time derivative in Lagrangian |
| Jul 3, 2023 | The Electromagnetic Connection |
| Jun 30, 2023 | Note on the Skyrme Model, Classical and Quantum |
| Jun 21, 2023 | The Phase Space |
| Jun 20, 2023 | Note on Meson-Kink Scattering |
| Jun 18, 2023 | Complex Line Bundle |
| Jun 17, 2023 | The Workers and the Fatherland |
| Jun 15, 2023 | Complex Vector Space |
| Jun 13, 2023 | Connections in a Vector Bundle |
| Jun 12, 2023 | Introduction to Higher Form Symmetry |
| Jun 4, 2023 | Basic Category Theory Lecture 2 |
| May 28, 2023 | Symmetry Groupoid |
| May 18, 2023 | (Vector) Fibre Bundles |
| Apr 29, 2023 | 威海攻略 |
| Apr 25, 2023 | Wigner-Weyl Calculus |
| Apr 24, 2023 | Basic Algebraic Geometry Class 15 |
| Apr 20, 2023 | Harmonic Forms |
| Apr 11, 2023 | Confinement in Toy Models |
| Apr 4, 2023 | Confinement in Toy Models |
| Apr 3, 2023 | De Rhams Theorem |
| Mar 24, 2023 | Betti Numbers |
| Mar 23, 2023 | Synge's Theorem |
| Mar 22, 2023 | Heuristics of Einstein's Theory |
| Mar 21, 2023 | Baron de Montesquieu, Charles-Louis de Secondat |
| Mar 21, 2023 | Geodesics and Jacobi Fields |
| Mar 21, 2023 | Confinement in Toy Models |
| Mar 17, 2023 | Riemann's Theorem and the Horizontal Distribution |
| Mar 16, 2023 | Covariant Differentiation and Curvature |
| Mar 12, 2023 | The Geometry of Surfaces |
| Feb 11, 2023 | Basic Algebraic Geometry Class 14 |
| Feb 10, 2023 | Basic Algebraic Geometry Class 13 |
| Feb 10, 2023 | Basic Algebraic Geometry Class 12 |
| Feb 9, 2023 | Basic Algebraic Geometry Class 11 |
| Feb 7, 2023 | Basic Algebraic Geometry Class 10 |
| Feb 6, 2023 | Basic Algebraic Geometry Class 9 |
| Feb 6, 2023 | Basic Algebraic Geometry Class 8 |
| Feb 4, 2023 | Basic Algebraic Geometry Class 7 |
| Feb 4, 2023 | Basic Algebraic Geometry Class 6 |
| Feb 2, 2023 | Basic Algebraic Geometry Class 5 |
| Feb 1, 2023 | Minkowski Space |
| Jan 13, 2023 | Caratheodory's approach to Thermodynamics |
| Jan 12, 2023 | Basic Category Theory Lecture 1 |
| Jan 10, 2023 | Holonomic and Nonholonomic Constraints |
| Jan 9, 2023 | A Guide to the US Political System |