Level: Lib Thy Top: 1 2
Hypotheses:

  1. A :

  2. R : A List A List

  3. EquivRel(A List;x,y.x R y)

  4. x,y,z:A List. x R y (z @ x) R (z @ y)

  5. g : x,y:(A List)//(x R y)

Conclusion:

Sym(x,y:(A List)//(x R y);u,v.u Rg v)

Applied Tactic: (BLemma `lquo_rel_symm` ...)
Generated subgoals:

None