X
A REMARK ON AUTOMORPHISM GROUPS
Joan L. Dyer
TABLE OF CONTENTS
ON THREE OF LYNDON'S RESULTS ABOUT MAPS
Leonard Greendlinger and Martin Greendlinger
ON THE INDECOMPOSABILITY OF CERTAIN RELATION CORES
K. W. Gruenberg
208
212
214
FOX SUBGROUPS OF FREE GROUPS II. . . . . . . . . . . . . . . . . . . 223
Narain Gupta
EXTENSION OF GROUPS BY TREE AUTOMORPHISMS
Narain Gupta and Said Sidki
232
LENGTH FUNCTIONS AND ALGORITHMS IN FREE GROUPS . . . . . . . . . . . 247
A. H. M. Hoare
SPLIT EXTENSIONS OF ABELIAN GROUPS WITH IDENTICAL SUBGROUP
STRUCTURES . . . . . . . . . . . . . . . . . . . . . .
Charles Holmes
NON-PLANARITY OF PLANAR GROUPS WITH REFLECTIONS
Johannes Huebschmann
A SURVEY OF THE CONJUGACY PROBLEM
R. Daniel Hurwitz
MAXIMAL ALGEBRAS OF BINARY RELATIONS
Bjarni Jonsson
UBER UNTERGRUPPEN EBENER DISKONTINUIERLICHER GRUPPEN
R. N. Kalia and G. Rosenberger
AUTOMORPHISMS OF A FREE PRODUCT WITH AN AMALGAMATED SUBGROUP
Abe Karrass, Alfred Pietrowski, and Donald Solitar
SOME REMARKS ON BRAID GROUPS . . . .
Abe Karrass, Alfred Pietrowski, and Donald Solitar
GEOMETRIC REALIZATION OF GROUP EXTENSIONS BY THE SEIFERT
CONSTRUCTION
Kyung Bai Lee and Frank Raymond
THE AUGMENTATION QUOTIENTS OF THE GROUPS OF ORDER
24
Gerald Losey and Nora Losey
FINITE-DIMENSIONAL ALGEBRAS AND k-GROUPS OF FINITE RANK
A. G. Myasnikov and V. N. Remeslennikov
THE COHOMOLOGY RING OF A ONE-RELATOR GROUP
John G. Ratcliffe
COMBINATORIAL GROUP THEORY, RIEMANN SURFACES AND DIFFERENTIAL
265
274
278
299
308
328
341
353
412
436
455
EQUATIONS . . . . . . . . . . . . . . . . . . . . . . 46 7
C. L. Tretkoff and M. D. Tretkoff
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