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For two unimodular complex number z1a n ...

For two unimodular complex number `z_1a n dz_2` `[[barz_1, -z_2], [barz_2, z_1]]^(-1)` `[[(z_1, z_2], [-barz_2, barz_1]]^(-1)` is equal to `[(z_1, z_2), (z_1bar, z_2bar)]^` b. `[1 0 0 1]` c. `[1//2 0 0 1//2]` d. none of these

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