%A  Kurusa Árpåd
%A  LĂĄngi Zsolt
%A  VĂ­gh Viktor
%N 5
%D 2020
%P AzonosĂ­tĂł: 156-Terjedelem: 15 p
%X In this note we prove that any monohedral tiling of the closed circular unit disc with $k \leq 3$ topological discs as tiles has a $k$-fold rotational symmetry. This result yields the first nontrivial estimate about the minimum number of tiles in a monohedral tiling of the circular disc in which not all tiles contain the center, and the first step towards answering a question of Stein appearing in the problem book of Croft, Falconer and Guy in 1994.
%I szte
%R MTMT:31407382 10.1007/s00009-020-01595-3
%V 17
%J MEDITERRANEAN JOURNAL OF MATHEMATICS
%L publicatio19353
%T Tiling a circular disc with congruent pieces