Users' Mathboxes Mathbox for BJ < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >   Mathboxes  >  wssb Structured version   Visualization version   GIF version

Syntax Definition wssb 31642
Description: Syntax for the substitution of a variable for a variable in a formula. (Contributed by BJ, 22-Dec-2020.)
Hypotheses
Ref Expression
wph wff 𝜑
vx setvar 𝑥
vt setvar 𝑡
Assertion
Ref Expression
wssb wff [𝑡/𝑥]b𝜑

See definition df-ssb 31643 for more information.

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