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theorem proved term proof

spatialNormSq_nonneg

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formal statement (Lean)

 131theorem spatialNormSq_nonneg (x : Fin 4 → ℝ) : 0 ≤ spatialNormSq x := by

proof body

Term-mode proof.

 132  unfold spatialNormSq
 133  positivity
 134

used by (11)

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depends on (1)

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