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Axiom ax-ltl2 25078
Description:  ph doesn't hold in the next step iff in the next step  -.  ph holds. (Contributed by FL, 20-Mar-2011.)
Assertion
Ref Expression
ax-ltl2  |-  ( -.  () ph  <->  ()  -.  ph )

Detailed syntax breakdown of Axiom ax-ltl2
StepHypRef Expression
1 wph . . . 4  wff  ph
21wcirc 25075 . . 3  wff  () ph
32wn 3 . 2  wff  -.  () ph
41wn 3 . . 3  wff  -.  ph
54wcirc 25075 . 2  wff  ()  -.  ph
63, 5wb 176 1  wff  ( -.  () ph  <->  ()  -.  ph )
Colors of variables: wff set class
This axiom is referenced by:  nxtor  25088  ltl4ev  25095  albineal  25102
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