Abstract
The simplest example of a Lie group is the group of rotations of the plane, with elements parametrized by a single number, the angle of rotation \(\theta \). It is useful to identify such group elements with unit vectors \(e^{i\theta }\) in the complex plane.
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© 2017 Peter Woit
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Woit, P. (2017). The Group U(1) and its Representations. In: Quantum Theory, Groups and Representations. Springer, Cham. https://doi.org/10.1007/978-3-319-64612-1_2
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DOI: https://doi.org/10.1007/978-3-319-64612-1_2
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