The Standard Model calculation of g-2 requires thousands of Feynman diagrams. This geometric model derives it from the topology of the lepton (icosahedron, 12 vertices). It posits the muon anomaly is the sum of the surface cost (Schwinger term) and the nodal friction against the 12 vertices:

  α = 0.00729735256
  N_v = 12

  Schwinger_term = α / (2 · π)
  Nodal_term = α^2 / 12 

  a_mu = Schwinger_term + Nodal_term

  Schwinger_term = α / (2 · π) ≈ 0.001161409
  Nodal_term = α^2 / 12 ≈ 0.000004438
  Total ≈ 0.001165847

  Experimental value: 0.001165920
  Discrepancy: 63 ppm

Source: Geometric Unification of Physical Interactions, v10. https://doi.org/10.5281/zenodo.17847770