English
The range of the sequence seminormFromConst_seq(x) is bounded below; in particular, there exists a real lower bound (namely 0) for all its terms.
Русский
Образ последовательности $\operatorname{seminormFromConstSeq}(x)$ ограничен снизу; в частности, 0 служит нижним пределом для всех её членов.
LaTeX
$$BddBelow( Set.range( seminormFromConst_seq c f x))$$
Lean4
/-- The image of `seminormFromConst_seq c f x` is bounded below by zero. -/
theorem seminormFromConst_bddBelow (x : R) : BddBelow (Set.range (seminormFromConst_seq c f x)) :=
by
use 0
rintro r ⟨n, rfl⟩
exact seminormFromConst_seq_nonneg c f x n