The Keyhole Geometry of Spacetime: Boundaries, Pathways, Field Convergence, and the Hourglass of Time
The Keyhole Geometry of Spacetime Boundaries, Pathways, Field Convergence, and the Hourglass of Time John Swygert November 9, 2026 DOI: To be assigned Abstract This paper develops the hypothesis that recurring keyhole and opposed-keyhole (hourglass) geometries can serve as a cross-domain language for boundaries, pathways, constrictions, and transitions. It distinguishes visual silhouettes from actual transport bottlenecks, state-space constraints, observational limits, and hypothetical spacetime throats. A dimensionless constriction ratio is defined and applied to a rectangular electromagnetic waveguide, where Maxwell’s equations predict a measurable cutoff change under narrowing. The result demonstrates how geometry can matter without implying a universal mechanism. Nikola Tesla’s Wardenclyffe Tower, the receding-traveler horizon analogy, and Einstein–Rosen bridges are considered at explicitly different levels of physical evidence. The proposed program asks whether common dimensionles...