| Length functions of group actions on A-trees R Alperin, H Bass Combinatorial group theory and topology, 265-378, 1987 | 223* | 1987 |
| A mathematical theory of Origami numbers and constructions R Alperin arXiv preprint math/9912039, 1999 | 163 | 1999 |
| An elementary account of Selberg's lemma RC Alperin L'Enseignement Math. 33, 269-273, 1987 | 100 | 1987 |
| One-, two-, and multi-fold origami axioms RC Alperin, RJ Lang Origami 4, 371-393, 2006 | 95 | 2006 |
| Linear groups of finite cohomological dimension RC Alperin, PB Shalen Inventiones mathematicae 66 (1), 89-98, 1982 | 58 | 1982 |
| Complete trees for groups with a real-valued length function RC Alperin, KN Moss Journal of the London Mathematical Society 2 (1), 55-68, 1985 | 50 | 1985 |
| Locally compact groups acting on trees and property T R Alperin Monatshefte für Mathematik 93 (4), 261-265, 1982 | 44 | 1982 |
| Integral sets and Cayley graphs of finite groups RC Alperin, BL Peterson the electronic journal of combinatorics, P44-P44, 2012 | 43 | 2012 |
| PSL_2 (Z)=Z_2*Z_3 RC Alperin Am. Math. Mon. 100 (4), 385-386, 1993 | 43 | 1993 |
| The modular tree of Pythagoras RC Alperin The American Mathematical Monthly 112 (9), 807-816, 2005 | 36 | 2005 |
| K_2 of quaternion algebras RC Alperin, RK Dennis Journal of Algebra 56 (1), 262-273, 1979 | 30 | 1979 |
| The boundary of the Gieseking tree in hyperbolic three-space RC Alperin, W Dicks, J Porti Topology and its Applications 93 (3), 219-259, 1999 | 27 | 1999 |
| Heron's area formula RC Alperin The College Mathematics Journal 18 (2), 137-138, 1987 | 25 | 1987 |
| SK 1 of finite abelian groups, II RC Alperin, RK Dennis, R Oliver, MR Stein Inventiones mathematicae 87 (2), 253-302, 1987 | 23 | 1987 |
| Homology of SL 2 (Z [ω]) R Alperin Commentarii Mathematici Helvetici 55 (1), 364-377, 1980 | 23* | 1980 |
| Locally compact groups acting on trees R Alperin Pacific Journal of Mathematics 100 (1), 23-32, 1982 | 21 | 1982 |
| The matrix of a rotation RC Alperin The College Mathematics Journal 20 (3), 230-230, 1989 | 20 | 1989 |
| Uniform exponential growth of polycyclic groups RC Alperin arXiv preprint math/0010280, 2000 | 18 | 2000 |
| The Poncelet pencil of rectangular hyperbolas RC Alperin Forum Geom 10, 15-20, 2010 | 17 | 2010 |
| Homology of the group of automorphisms of k[ x, y] RC Alperin Journal of Pure and Applied Algebra 15 (2), 109-115, 1979 | 17 | 1979 |
Robert J. LangLangorigami.comVerified email at langorigami.com
