Abstract
This paper gives a detailed introduction to the orbifold notation for two-dimensional (2-D) symmetry groups. It discusses the correspondence between properties of orbifolds and symmetries in the original surface. The problem of determining a group in situ is addressed. Elementary proofs of the classification of the Euclidean and spherical 2-D symmetry groups are presented.
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Conway, J.H., Huson, D.H. The Orbifold Notation for Two-Dimensional Groups. Structural Chemistry 13, 247–257 (2002). https://doi.org/10.1023/A:1015851621002
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DOI: https://doi.org/10.1023/A:1015851621002