English
The set {x | (x ∈ s ∧ x ∈ t) ∧ p x} equals {x ∈ s | p x} ∩ {x ∈ t | p x}.
Русский
Множество {x | (x ∈ s ∧ x ∈ t) ∧ p x} равно {x ∈ s | p x} ∩ {x ∈ t | p x}.
LaTeX
$$$\{x \mid (x \in s \land x \in t) \land p x\} = \{x \in s \mid p x\} \cap \{x \in t \mid p x\}$$$
Lean4
@[simp]
theorem sep_inter : {x | (x ∈ s ∧ x ∈ t) ∧ p x} = {x ∈ s | p x} ∩ {x ∈ t | p x} :=
inter_inter_distrib_right s t {x | p x}