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In mathematics, a frieze or frieze pattern is a design on a two-dimensional surface that is There are seven frieze groups, listed in the summary table. . The lattice being oblique means that the second direction need not be orthogonal to the. A Gallery of Twill-plaited Designs and Patterns Paulus Gerdes strip patterns visible on sipatsi will be used to illustrate the seven strip pattern classes and By definition, all strip patterns have translational symmetry, that is, they are invariant.