15 citations · 15 across the 3 of their papers we have counts for
3 papers
math.AP2026
The Ptolemy-Alhazen problem with source at infinity
Masayo Fujimura, Matti Vuorinen
We study the well-known Ptolemy-Alhazen problem on reflection of light at the surface of a spherical mirror in the case when the source of light is very far from the mirror.
math.CV2023
On the hyperbolic metric of certain domains
Aimo Hinkkanen, Matti Vuorinen
We prove that if is a compact subset of the unit disk in the complex plane, if contains a sequence of distinct points for such that $\l…
math.MG2020★ 15 cited
Triangular ratio metric under quasiconformal mappings in sector domains
Oona Rainio, Matti Vuorinen
Hyperbolic metric and different hyperbolic type metrics are studied in open sector domains of the complex plane. Several sharp inequalities are proven for them. Our main result des…