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Le simmetrie dei fregi ornamentali

Eva Ferrara Dentice


Frieze patterns are used in many places other than about the friezes of buildings. By discounting the scale and subject matter and by considering only the symmetries under which such patterns are left invariant, we shall see that there are only seven possible types of ornamental frieze patterns. The geometry of the isometries of the Euclidean plane and few elements of group theory will be necessary tools for classifying Frieze groups. In this way, we hope that the charm of recognizing symmetries in architectures and friezes can motivate the acquisition of the necessary concepts of geometry and algebra.

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