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theorem proved term proof

prove_upper_bound_le

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formal statement (Lean)

  42theorem prove_upper_bound_le {I : Interval} {x : ℝ} {b : ℚ}
  43    (h_contains : I.contains x) (h_hi : I.hi ≤ b) : x ≤ (b : ℝ) :=

proof body

Term-mode proof.

  44  I.hi_le_implies_contains_le h_hi h_contains
  45
  46/-- Prove that φ is in its interval -/

depends on (11)

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