English
The floor of x when viewed in any ambient field K with a compatible order equals the floor of x in the nonnegative rationals.
Русский
Пол числа x, представленного в произвольном окружении K с совместимым порядком, равен floor(x) в ℚ≥0.
LaTeX
$$∀ {K} [Field K] [LinearOrder K] [IsStrictOrderedRing K] [FloorSemiring K], (x ∈ ℚ_{≥0}) ⇒ ⌊x\!\uparrow_K⌋_{+} = ⌊x⌋_{+}$$
Lean4
@[simp, norm_cast]
theorem coe_ceil (q : ℚ≥0) : ↑⌈q⌉₊ = ⌈(q : ℚ)⌉ :=
Int.natCast_ceil_eq_ceil q.coe_nonneg