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December 26th, 2016, 04:35 AM   #1
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Proof an equivalence relation

Hello, i have encountered a problem where i have to proof that the relation σ ≡ τ is an equivalence relation the relation is defined like this σ ≡ τ ⇔ ∃ρ∈Symn [ρσ = τ ρ].

I know how to prove the reflexivity and symmetry but i cant figure out how to proof the transitivity. can anybody help?
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