Proton Magnetic Moment as a Topological Invariant of Multitoroidal Vacuum Geometry.

We derive the proton magnetic moment directly from the geometry and topology
of multitoroidal vacuum configurations.
The result follows from vacuum-induced surface currents localized at aperture
regions and from topological quantization imposed by spin structure and
4\pi phase closure.
No constituent quark model, phenomenological parameters, or adjustable
couplings are introduced.
The proton magnetic moment emerges as a pure geometric invariant of a trefoil
configuration with unavoidable 2+1 asymmetry.