Introduce Z-prime charge assignments for Standard Model fermions#913
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Introduce the key data structure for Z′-models over the Standard Model: integer charge assignments for the chiral SM fermions with n families. This provides a lightweight foundation for the Z′ API (issue lean-phys-community#880), on which family symmetries, anomaly cancellation conditions, and equivalence relations will be built in subsequent work.
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| /-- Integer Z′-charges for the `n`-family Standard Model fermions (without RHN). -/ | ||
| abbrev SMZPrimeCharges (n : ℕ) : Type := Fin 5 → Fin n → ℤ |
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Looks, good, although I would make this a structure not an abbreviation. You could even make the fields of the abbreviation Q, U, D etc. I would also make a note in
About this new definition of things
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Introduce the key data structure for Z′-models over the Standard Model: integer charge assignments for the chiral SM fermions with n families.
This provides a lightweight foundation for the Z′ API (issue #880), on which family symmetries, anomaly cancellation conditions, and equivalence relations will be built in subsequent work.