seminormFromBounded_nonzero

∀ {R : Type u_1} [inst : CommRing R] {f : R → ℝ} {c : ℝ},
  f ≠ 0 → 0 ≤ f → (∀ (x y : R), f (x * y) ≤ c * f x * f y) → seminormFromBounded' f ≠ 0

If f : R → ℝ is a nonzero, nonnegative, multiplicatively bounded function, then seminormFromBounded' f is nonzero.

Defined in: Mathlib.Analysis.Normed.Unbundled.SeminormFromBounded
Cited by: 0 results in Mathlib
Foundations: Depth 119 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes: CommRing

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