102 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
3 papers · 1 filter
The Ptolemy-Alhazen problem and quadric surface mirror reflection
Masayo Fujimura, Marcelina Mocanu, Matti Vuorinen
We discuss the problem of the reflection of light on spherical and quadric surface mirrors. In the case of spherical mirrors, this problem is known as the Alhazen problem. For the…
A new intrinsic metric and quasiregular maps
Masayo Fujimura, Marcelina Mocanu, Matti Vuorinen
We introduce a new intrinsic metric in subdomains of a metric space and give upper and lower bounds for it in terms of well-known metrics. We also prove distortion results for this…
Barrlund's distance function and quasiconformal maps
Masayo Fujimura, Marcelina Mocanu, Matti Vuorinen
Answering a question about triangle inequality suggested by R. Li, A. Barrlund introduced a distance function which is a metric on a subdomain of We study this B…