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math.MG2015
Isoptic surfaces of polyhedra
Géza Csima, Jenő Szirmai
The theory of the isoptic curves is widely studied in the Euclidean plane $\bE^2$ (see \cite{CMM91} and \cite{Wi} and the references given there). The analogous question was invest…
math.MG2015
Isoptic curves of generalized conic sections in the hyperbolic plane
Géza Csima, Jenő Szirmai
After having investigated the real conic sections and their isoptic curves in the hyperbolic plane $\bH^2$ we consider the problem of the isoptic curves of generalized conic sectio…