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Example: Twisting by a Torus Action<br />
Take H = A(T 2 ), generated by t1, t2 with tjt ∗ j = t∗ j tj = 1,<br />
∆(tj) = tj ⊗ tj, S(tj) = t ∗ j , ɛ(tj) = 1.<br />
S. Brain (RU) NCG of Self-Dual Gauge Fields Nijmegen, 12th October 2010 13 / 25