p. 265 - 281 A note on spherical f--tilings by right triangles C. P. Avelino and A. F. Santos Received: February 24, 2012; Revised: April 4, 2012; Accepted: April 5, 2012 Abstract. In this paper we present some spherical f-tilings by two (distinct) right triangles. We classify the group of symmetries of the presented tilings and the transitivity classes of isohedrality are also determined. Keywords: dihedral f-tilings; spherical trigonometry; combinatorial properties; symmetry groups. AMS Subject classification: Primary: 52C20, 05B45, 52B05, 20B35 PDF Compressed Postscript Version to read ISSN 0862-9544 (Printed edition) Faculty of Mathematics, Physics and Informatics Comenius University 842 48 Bratislava, Slovak Republic Telephone: + 421-2-60295111 Fax: + 421-2-65425882 e-Mail: amuc@fmph.uniba.sk Internet: www.iam.fmph.uniba.sk/amuc © 2012, ACTA MATHEMATICA UNIVERSITATIS COMENIANAE |