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[PVS-Help] help to prove my first theorem

Hello All,

     I am new to PVS. I wrote my first theorem and I
am not able to prove it using PVS. I have read the
documentation abt the prover but I am not able to do
it. May be its trivial but not yet for me. The
following is my first theory.

First : Theory

   m : Var nat

Th1 : Theorem Forall (m1: bvec[m]): exists
(m2:bvec[m]): (xor(m1,m2) = m1) => (m2=nat2bv(0))

End First


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