Paper 21: Replacing Dark Matter with Coherence: Galaxy Rotation from Angular Strain in the Holosphere Lattice

We present a physically constrained model of galaxy rotation curves based on coherence propagation in a discrete angular strain lattice, known as Holosphere Theory. Without invoking dark matter, photometric mass-to-light ratios, or empirical tuning, the model reproduces the observed rotation profiles of 100 real galaxies drawn from the SPARC and Rotmod LTG datasets. The Holosphere velocity equation combines radial strain buildup, angular phase inheritance, and exponential coherence decay using only five parameters, one of which (the angular exponent β = 3/2) is fixed from geometric derivation. Fit performance is evaluated using root-mean-square residuals, reduced chi-squared, Akaike Information Criterion (AIC), and Bayesian Information Criterion (BIC), and is compared against ΛCDM and MOND benchmarks. The Holosphere model achieves competitive or superior fits with lower AIC/BIC values and strong explanatory power (R² > 0.89) across diverse galaxy types. A falsifiable correlation is proposed between the coherence decay length (r_d) and cosmic environment, offering a testable link between galactic dynamics and large-scale structure. This work was completed without institutional affiliation and developed in close collaboration with AI language models (ChatGPT, Claude, and Grok), demonstrating the viability of first-principles modeling as an alternative to dark matter paradigms.