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def definition def or abbrev

SpaceTranslation

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formal statement (Lean)

 145def SpaceTranslation : OneParamGroup ℝ where
 146  flow dx x := x + dx

proof body

Definition body.

 147  flow_zero x := by ring
 148  flow_add s t x := by ring
 149
 150/-- **THEOREM**: Any space-translation-invariant function is conserved.
 151    (Lagrangian invariant under space translation ⟹ Momentum conserved) -/

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