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Woit · 2025-10-20
已登记出处中的最早位置:§40.4 · en。
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§40.4 · en · machine_draft · machine-draft-not-reviewed
Just as the groups have double covers , the group has a double cover , which we will show can be identified with the group of 2 by 2 complex matrices with unit determinant. This group will have the same Lie algebra as , and we will sometimes refer to either group as the “Lorentz group”.