-- Reproduction axiom trail -- re-derived from source (TOOLCHAIN tier).
-- theorem : quat_normalize_unit
-- source  : eml-stdlib/eml_stdlib/control/attitude_quaternion.eml  ->  eml-compile --target lean
-- tool    : forge 92b1b41 . machlib 2c8cc0c . lean via lake
-- when    : 2026-07-07T15:39:51Z
-- verdict : CLEAN -- footprint free of sorry- and classical-citation axioms
-- forbid  : sorryAx
-- (re-derive: make verify-proof)
--
'quat_normalize_unit' depends on axioms: [propext,
 Classical.choice,
 MachLib.Real,
 Quot.sound,
 MachLib.Real.addR,
 MachLib.Real.add_assoc,
 MachLib.Real.add_comm,
 MachLib.Real.add_neg,
 MachLib.Real.add_zero,
 MachLib.Real.divR,
 MachLib.Real.div_def,
 MachLib.Real.leR,
 MachLib.Real.le_iff_lt_or_eq,
 MachLib.Real.ltR,
 MachLib.Real.lt_irrefl_ax,
 MachLib.Real.mulR,
 MachLib.Real.mul_assoc,
 MachLib.Real.mul_comm,
 MachLib.Real.mul_distrib,
 MachLib.Real.mul_inv,
 MachLib.Real.mul_one_ax,
 MachLib.Real.negR,
 MachLib.Real.oneR,
 MachLib.Real.sqrt,
 MachLib.Real.sqrt_nonneg,
 MachLib.Real.sqrt_sq_nonneg,
 MachLib.Real.subR,
 MachLib.Real.sub_def,
 MachLib.Real.zeroR]