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Theorem tbw-ax1 1465
Description: The first of four axioms in the Tarski-Bernays-Wajsberg system. (Contributed by Anthony Hart, 13-Aug-2011.) (Proof modification is discouraged.) (New usage is discouraged.)
Ref Expression

Proof of Theorem tbw-ax1
StepHypRef Expression
1 imim1 70 1
Colors of variables: wff setvar class
Syntax hints:   wi 4
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7
This theorem is referenced by:  tbwsyl  1469  tbwlem1  1470  tbwlem2  1471  tbwlem3  1472  tbwlem4  1473  tbwlem5  1474  re1luk1  1475  re1luk2  1476  re1luk3  1477
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