On the description of symmetry of OD str
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Dr. K. Fichtner
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Article
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1980
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John Wiley and Sons
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English
β 334 KB
## Abstract Two kinds of short symbols are proposed: 1. The short symbol of any OD groupoidβfamily consists of two parts: the symbol for the point group of the groupoid of partial symmetry operations and the symbol for the layer group. No information on the parameters is given. 2. The short symbol