The symmetrical design called dyrnak gul is characterized by diagonal lines
and angular projections. Its symmetry of form
relies upon reflection along two axes. Color alternation plays with this
symmetry, drawing attention to the inherent rotation.
Two slightly different forms of dyrnak gul are repeated to form the field
pattern, which is based upon reflection and glide reflection. Combining these
two symmetry operations also results in rotation. Can you locate the centers
of rotation?
In most Oriental rugs, a main border surrounds the central field. Typically,
there is an awkward transition from the sides to the top and bottom borders,
as you can see in this rug. Here, the border pattern utilizes reflection and
glide reflection.
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