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Juguete lógico matemático de círculos secantes, que se caracteriza por comprender piezas inscritas en varias circunferencias de radio unidad y que pasan por los centros de las contiguas, a fin de reconstruir posiciones y orientaciones predeterminadas de las piezas, por medio de sucesivos giros de 60p de las piezas inscritas en las circunferencias.
He is conversant with the technique and literature cited in the dissertation and carried out the work0~ thoroughly. It seems that the thesis is fit for submission for Ph. D. and he is worthy for award of the degree.