Theorems · Theorem · field theory

Filter.Tendsto.neg_mul_atTop

∀ {𝕜 : Type u_1} {α : Type u_2} [inst : Field 𝕜] [inst_1 : LinearOrder 𝕜] [IsStrictOrderedRing 𝕜]
  [inst_3 : TopologicalSpace 𝕜] [OrderTopology 𝕜] {l : Filter α} {f g : α → 𝕜} {C : 𝕜},
  C < 0 →
    Filter.Tendsto f l (nhds C) → Filter.Tendsto g l Filter.atTop → Filter.Tendsto (fun x => f x * g x) l Filter.atBot

In a linearly ordered field with the order topology, if f tends to a negative constant C and g tends to Filter.atTop then f * g tends to Filter.atBot.

Defined in

Mathlib.Topology.Algebra.Order.Field

Cited by

3 results in Mathlib

Foundations

Depth 83 from the axioms · uses propext, Classical.choice, Quot.sound

Assumes

FieldLinearOrderIsStrictOrderedRingTopologicalSpaceOrderTopology