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theorem proved term proof

display_speed_positive

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formal statement (Lean)

  97theorem display_speed_positive (U : RSUnits) (h : 0 < U.tau0) (hc : 0 < U.c) :
  98  0 < (lambda_kin_display U) / (tau_rec_display U) := by

proof body

Term-mode proof.

  99  rw [display_speed_eq_c U h]
 100  exact hc
 101
 102/-- Displays scale uniformly: ratio is scale-invariant -/

depends on (15)

Lean names referenced from this declaration's body.