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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
Density upper bound for congruent and non-congruent hyperball packings generated by truncated regular simplex tilings
Jenő Szirmai
In this paper we study congruent and non-congruent hyperball (hypersphere) packings of the truncated regular tetrahedron tilings. These are derived from the Coxeter simplex tilings…