# Preferred Frame Pre-Prints [Home](/) · [README.md](/README.md.html) · [Contact Us](/contact%20us.md.html) --- [/ ](../) [📂 _proposals /](./) - 📂 [Discrete Electric Charge as a Topological Invariant of Source-Free Maxwell Fields](Discrete%20Electric%20Charge%20as%20a%20Topological%20Invariant%20of%20Source-Free%20Maxwell%20Fields/) - 📂 [PNPMD Markdown Specification](PNPMD%20Markdown%20Specification/) - 📂 [Point-Not-Point: Deriving Maxwell Electrodynamics from a Scalar Energy Field and Explaining Particle-Wave Duality](Point-Not-Point:%20Deriving%20Maxwell%20Electrodynamics%20from%20a%20Scalar%20Energy%20Field%20and%20Explaining%20Particle-Wave%20Duality/) - 📂 [Polarization Is Just Another Field](Polarization%20Is%20Just%20Another%20Field/) - 📂 [Topology-Discrete vs Energy-Continuous Forces in Maxwell Tori](Topology-Discrete%20vs%20Energy-Continuous%20Forces%20in%20Maxwell%20Tori/) --- - [Preferred Frame Pre-Prints's on GitHub.com](https://github.com/siran/research) - Back to main journal: [Preferred Frame](https://preferredframe.com) (built: 2025-12-08 12:22 EST UTC-5)