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<url><loc>https://elliotmcguckenphysics.com/2026/04/24/deriving-thermodynamics-as-a-theorem-of-the-mcgucken-principle-dx%e2%82%84-dt-ic-resolving-einsteins-unease-the-probability-measure-as-haar-measure-ergodicity-as-huygens-wavefront-iden/</loc><news:news><news:publication><news:name>The McGucken Principle: The fourth dimension x4 is expanding at the velocity of light c: x4=ict, ergo dx4/dt=ic</news:name><news:language>en</news:language></news:publication><news:publication_date>2026-04-24T23:17:27+00:00</news:publication_date><news:title>Deriving Thermodynamics as a Theorem of the McGucken Principle dx₄/dt = ic: Resolving Einstein&#8217;s Unease — The Probability Measure as Haar Measure, Ergodicity as Huygens-Wavefront Identity, and the Second Law as Strict dS/dt &#062; 0</news:title></news:news></url><url><loc>https://elliotmcguckenphysics.com/2026/04/24/the-mcgucken-principle-as-the-unique-physical-kleinian-foundation-how-dx%e2%82%84-dt-ic-uniquely-generates-the-seven-mcgucken-dualities-of-physics-1-hamiltonian-lagrangian-2-noether/</loc><news:news><news:publication><news:name>The McGucken Principle: The fourth dimension x4 is expanding at the velocity of light c: x4=ict, ergo dx4/dt=ic</news:name><news:language>en</news:language></news:publication><news:publication_date>2026-04-24T21:52:09+00:00</news:publication_date><news:title>The McGucken Principle as the Unique Physical Kleinian Foundation: How dx₄/dt = ic Uniquely Generates the Seven McGucken Dualities of Physics — (1) Hamiltonian/Lagrangian, (2) Noether Conservation Laws / Second Law of Thermodynamics, (3) Heisenberg/Schrödinger, (4) Wave/Particle, (5) Locality/Nonlocality, (6) Rest Mass / Energy of Spatial Motion, and (7) Time/Space — as Theorems of the Kleinian Correspondence Between Algebra and Geometry, and Why It Is Unique</news:title></news:news></url><url><loc>https://elliotmcguckenphysics.com/2026/04/24/how-the-mcgucken-principle-of-a-fourth-expanding-dimension-generates-and-unifies-the-dual-a-b-channel-structure-of-physics-a-hamiltonian-operator-formulation-b-lagrangian-path-integral-and/</loc><news:news><news:publication><news:name>The McGucken Principle: The fourth dimension x4 is expanding at the velocity of light c: x4=ict, ergo dx4/dt=ic</news:name><news:language>en</news:language></news:publication><news:publication_date>2026-04-24T17:16:30+00:00</news:publication_date><news:title>How the McGucken Principle of a Fourth Expanding Dimension Generates and Unifies the Dual A-B Channel Structure of Physics: (A: Hamiltonian Operator Formulation &#038; B: Lagrangian Path Integral) and (A: Noether Conservation Laws &#038; B: Second Law of Thermodynamics) and (A: Heisenberg PicturHow the McGucken Principle of a Fourth Expanding Dimension Generates and Unifies the Dual A-B Channel Structure of Physics: (A: Hamiltonian Operator Formulation &#038; B: Lagrangian Path Integral) and (A: Noether Conservation Laws &#038; B: Second Law of Thermodynamics) and (A: Heisenberg Picture &#038; B: Schrödinger Picture) and (A: Particle Aspect &#038; B: Wave Aspect) and (A: Local Microcausality &#038; B: Nonlocal Bell Correlations) and (A: Rest Mass &#038; B: Energy of Spatial Motion) and (A: Time &#038; B: Space) via dx₄/dt = ic</news:title></news:news></url><url><loc>https://elliotmcguckenphysics.com/2026/04/23/feynman-diagrams-as-theorems-of-the-mcgucken-principle-propagators-vertices-loops-wick-contractions-and-the-dyson-expansion-as-iterated-huygens-with-interaction-on-the-expanding-fourth-dimension/</loc><news:news><news:publication><news:name>The McGucken Principle: The fourth dimension x4 is expanding at the velocity of light c: x4=ict, ergo dx4/dt=ic</news:name><news:language>en</news:language></news:publication><news:publication_date>2026-04-23T23:24:31+00:00</news:publication_date><news:title>Feynman Diagrams as Theorems of the McGucken Principle: Propagators, Vertices, Loops, Wick Contractions, and the Dyson Expansion as Iterated Huygens-with-Interaction on the Expanding Fourth Dimension</news:title></news:news></url><url><loc>https://elliotmcguckenphysics.com/2026/04/23/the-deeper-foundations-of-quantum-mechanics-how-the-mcgucken-principle-uniquely-generates-the-hamiltonian-and-lagrangian-formulations-of-quantum-mechanics-wave-particle-duality-the-schrodinger-and/</loc><news:news><news:publication><news:name>The McGucken Principle: The fourth dimension x4 is expanding at the velocity of light c: x4=ict, ergo dx4/dt=ic</news:name><news:language>en</news:language></news:publication><news:publication_date>2026-04-23T22:28:38+00:00</news:publication_date><news:title>The Deeper Foundations of Quantum Mechanics: How The McGucken Principle Uniquely Generates the Hamiltonian and Lagrangian Formulations of Quantum Mechanics, Wave/Particle Duality, the Schrödinger and Heisenberg Pictures, and Locality and Nonlocality all from dx₄/dt = ic</news:title></news:news></url><url><loc>https://elliotmcguckenphysics.com/2026/04/23/the-mcgucken-principle-as-the-common-foundation-of-the-conservation-laws-and-the-second-law-of-thermodynamics-a-remarkable-and-counter-intuitive-unification/</loc><news:news><news:publication><news:name>The McGucken Principle: The fourth dimension x4 is expanding at the velocity of light c: x4=ict, ergo dx4/dt=ic</news:name><news:language>en</news:language></news:publication><news:publication_date>2026-04-23T22:07:04+00:00</news:publication_date><news:title>The McGucken Principle dx4/dt=ic as the Common Foundation of the Conservation Laws and the Second Law of Thermodynamics: A Remarkable and Counter-Intuitive Unification</news:title></news:news></url><url><loc>https://elliotmcguckenphysics.com/2026/04/23/the-unique-mcgucken-lagrangian-all-four-sectors-free-particle-kinetic-dirac-matter-yang-mills-gauge-einstein-hilbert-gravitational-forced-by-the-mcgucken-principle-dx%e2%82%84-2/</loc><news:news><news:publication><news:name>The McGucken Principle: The fourth dimension x4 is expanding at the velocity of light c: x4=ict, ergo dx4/dt=ic</news:name><news:language>en</news:language></news:publication><news:publication_date>2026-04-23T17:55:20+00:00</news:publication_date><news:title>The Unique McGucken Lagrangian: All Four Sectors — Free-Particle Kinetic, Dirac Matter, Yang-Mills Gauge, Einstein-Hilbert Gravitational — Forced by the McGucken Principle dx₄/dt = ic:  A Derivation of the Least-Action Functional for Physics from the Single Geometric Principle dx₄/dt = ic, with a History of Lagrangian Methods from Maupertuis to Witten and a Formal Uniqueness Proof</news:title></news:news></url></urlset>