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LeanPool.DirectedTopologyLean4.UnitIntervalAux

LeanPool.DirectedTopologyLean4.UnitIntervalAux #

theorem unitIAux.double_pos_of_pos {T : ↑unitInterval} (hT₀ : 0 < T) :
0 < 2 * ↑T
theorem unitIAux.double_sigma_pos_of_lt_one {T : ↑unitInterval} (hT₁ : T < 1) :
0 < 2 * (1 - ↑T)
theorem unitIAux.double_mem_I {t : ↑unitInterval} (ht : ↑t ≤ 2⁻¹) :
theorem unitIAux.interp_left_le_of_le (T : ↑unitInterval) {a b : ↑unitInterval} (hab : a ≤ b) :
↑(unitInterval.symm T) * ↑a + ↑T ≤ ↑(unitInterval.symm T) * ↑b + ↑T
@[reducible, inline]
noncomputable abbrev unitIAux.halfI :

The midpoint 1/2 of the unit interval.

Equations
Instances For
    theorem unitIAux.has_T_half {t₀ t₁ : ↑unitInterval} (γ : Path t₀ t₁) (ht₀ : ↑t₀ < 2⁻¹) (ht₁ : ↑t₁ > 2⁻¹) :
    ∃ (T : ↑unitInterval), 0 < T ∧ T < 1 ∧ γ T = halfI