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math.MG2017★ 18 cited
Any cyclic quadrilateral can be inscribed in any closed convex smooth curve
Arseniy Akopyan, Sergey Avvakumov
We prove that any cyclic quadrilateral can be inscribed in any closed convex -curve. The smoothness condition is not required if the quadrilateral is a rectangle.
math.GT2017
The classification of linked -manifolds in -space
Sergey Avvakumov
Let and be closed connected orientable -manifolds. We classify the sets of smooth and piecewise linear isotopy classes of embeddings .