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def

c

definition
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module
IndisputableMonolith.Constants.Codata
domain
Constants
line
27 · github
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IndisputableMonolith.Constants.Codata on GitHub at line 27.

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  24/-! ## CODATA 2018 reference values -/
  25
  26/-- Speed of light (exact SI definition). -/
  27@[simp] noncomputable def c : ℝ := 299792458
  28
  29/-- Reduced Planck constant (CODATA 2018). -/
  30@[simp] noncomputable def hbar : ℝ := 1.054571817e-34
  31
  32/-- Gravitational constant (CODATA 2018). -/
  33@[simp] noncomputable def G : ℝ := 6.67430e-11
  34
  35lemma c_pos : 0 < c := by unfold c; norm_num
  36lemma hbar_pos : 0 < hbar := by unfold hbar; norm_num
  37lemma G_pos : 0 < G := by unfold G; norm_num
  38
  39lemma c_ne_zero : c ≠ 0 := ne_of_gt c_pos
  40lemma hbar_ne_zero : hbar ≠ 0 := ne_of_gt hbar_pos
  41lemma G_ne_zero : G ≠ 0 := ne_of_gt G_pos
  42
  43end
  44
  45end Constants
  46end IndisputableMonolith