Paulus Gerdes

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1. African Sona and Mirror Curves The sona tradition was developed in eastern Angola and neighbouring areas of today's Zambia and Congo/Zaire (GERDES, 1995). Illustrations in the sand accompanied story telling among the male Cokwe population. Sona are composed of lines embracing the dots of a reference frame of certain dimensions. Most sona are monolinear(More)
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