English
If ts' is a family of topological spaces indexed by i and each has continuous inversion, then the infimum topology ⨅ i, ts' i also has continuous inversion.
Русский
Пусть ts' — семейство топологий, индексируемых i; если каждая имеет непрерывную инверсию, то инфимума этих топологий также имеет непрерывность инверсии.
LaTeX
$$$(\forall i, \text{ContinuousInv } G\text{ under } ts'(i)) \Rightarrow \text{ContinuousInv } G\text{ under } \bigwedge_i ts'(i).$$$
Lean4
@[to_additive]
theorem continuousInv_iInf {ts' : ι' → TopologicalSpace G} (h' : ∀ i, @ContinuousInv G (ts' i) _) :
@ContinuousInv G (⨅ i, ts' i) _ := by
rw [← sInf_range]
exact continuousInv_sInf (Set.forall_mem_range.mpr h')