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<url><loc>https://elliotmcguckenphysics.com/2026/04/22/string-theory-dynamics-from-dx%e2%82%84-dt-ic-the-results-of-wittens-string-theory-dynamics-in-various-dimensions-as-theorems-of-the-mcgucken-principle-why-the-extra-spatial-dimensi/</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>2026-04-22T22:00:39+00:00</news:publication_date><news:title>String Theory Dynamics from dx₄/dt = ic: The Results of Witten&#8217;s &#8220;String Theory Dynamics in Various Dimensions&#8221; as Theorems of the McGucken Principle — Why the Extra Spatial Dimensions of String Theory Are Not Required, and How the Eleven-Dimensional M-Theory Unification Follows from McGucken&#8217;s Fourth Expanding 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