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def definition def or abbrev

darkSector

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formal statement (Lean)

 149def darkSector : List (Fin 8) := [1, 3, 5, 7]

proof body

Definition body.

 150
 151/-- Why do odd phases not couple to photons?
 152
 153    Photons are phase-0 excitations.
 154    Only even-phase matter can exchange phase-0 quanta.
 155    Odd-phase matter is "invisible" to photons. -/

depends on (6)

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