The Geometric Origin of Neutron Star Universal Relations: Shell Closure, Sign-Flip Geometry, and the Bridge Between Nuclear Structure and I-Love-Q Universality

Demonstrates that GCT provides the missing bridge between microscopic nuclear structure and macroscopic neutron star I-Love-Q universality. Shell closures map to cascade boundaries, nuclear shape coexistence maps to the sign-flip zone, symmetry energy slope L maps to the resolution parameter beta=0.261, and EOS insensitivity of I-Love-Q maps to model-independence of cascade-resolved invariants. Five testable predictions using AME2020 database and existing neutron star observations.