2 citations · 2 across the 3 of their papers we have counts for
3 papers
math.CO2010
A Lattice Point Problem on the Regular Tree
Femke Douma
Heinz Huber (1956) considered the following problem on the the hyperbolic plane H. Consider a strictly hyperbolic subgroup of automorphisms on H with compact quotient, and choose a…
math.CO2009★ 2 cited
Radial Averages on Regular and Semiregular Graphs
Femke Douma
In 1966, P. Günther proved the following result: Given a continuous function on a compact surface of constant curvature -1 and its periodic lift to the universa…
math.CO2008
Spherical Averages on Regular and Semiregular Graphs
Femke Douma
In 1966, P. Guenther proved the following result: Given a continuous function f on a compact surface M of constant curvature -1 and its periodic lift g to the universal covering, t…