Description: The fourth of four axioms in the Tarski-Bernays-Wajsberg system.
This axiom was added to the Tarski-Bernays axiom system (see tb-ax1 , tb-ax2 , and tb-ax3 ) by Wajsberg for completeness. (Contributed by Anthony Hart, 13-Aug-2011) (Proof modification is discouraged.) (New usage is discouraged.)
Ref | Expression | ||
---|---|---|---|
Assertion | tbw-ax4 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | falim |