ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  weu GIF version

Syntax Definition weu 1916
Description: Extend wff definition to include existential uniqueness ("there exists a unique 𝑥 such that 𝜑").
Hypotheses
Ref Expression
wph wff 𝜑
vx setvar 𝑥
Assertion
Ref Expression
weu wff ∃!𝑥𝜑

See definition df-eu 1919 for more information.

Colors of variables: wff set class
  Copyright terms: Public domain W3C validator