Crosta Invertita v11 — Black Hole Cosmology with a Boundary Field and Scar-Induced Vacuum Repulsion (unverified hypothesis)

Unverified cosmological hypothesis, not peer reviewed. The observable universe is modelled as the interior of a mother black hole. A single scalar field describes the tension of its boundary: its rest tension is the dark energy of today, and an early displaced phase acts as early dark energy (fitted, f ≈ 7% at z ≈ 3500). Black holes born inside the universe leave "scars" modelled, as a working choice, with cosmological coupling (k = 3), which predicts a small extra vacuum energy (≈ 1.7% of the dark energy, ΔH0 ≈ 0.4 km/s/Mpc). Tests with BAO, cosmic chronometers, Pantheon+ supernovae (full covariance) and compressed Planck CMB show the model is not excluded, but the scar effect is not detectable with current data. THE HUBBLE TENSION IS NOT SOLVED: with full CMB analyses published in the literature, early dark energy reduces it only partly (H0 ≈ 69-70), with possible cost on S8. The document lists predictions that would falsify the model, open problems (no derivation from a full action, energy source of the scars unresolved) and related work (Pathria, Smolin, Poplawski, Farrah et al., Cadoni et al., Ghodla et al., Lei et al.). Numerical analyses were carried out with AI assistance (Claude, Anthropic) and must be independently verified. Text in Italian. Ipotesi cosmologica non verificata e non sottoposta a revisione tra pari. La tensione di Hubble non è risolta. Analisi numeriche svolte con assistenza di IA, da verificare in modo indipendente.