TABLE OF CONTENTS
Preface . . . . .
ROGER C. LYNDON: A BIOGRAPHICAL AND PERSONAL NOTE
Kenneth
I.
Appel
xi
1
SPECTRAL COMPLICATIONS IN COHOMOLOGY COMPUTATIONS . . . . . . . . . . 11
Saunders Mac Lane
LYNDON'S CONTRIBUTION TO COHOMOLOGY OF GROUPS . . . . . . . . . . . . 24
John G. Ratcliffe
LYNDON'S RESEARCH IN MATHEMATICAL LOGIC
H. Jerome Keisler
29
SOME ASPECTS OF LYNDON'S WORK ON GROUP THEORY . . . . . . . . . . . . 33
Paul E. Schupp
IA-AUTOMORPHISMS OF FREE PRODUCTS OF ABELIAN GROUPS
S. Andreadakis
ON ARTIN GROUPS AND COXETER GROUPS OF LARGE TYPE
Kenneth I. Appel
THE FINITE GENERATION OF AUT(G), G-FREE METABELIAN OF RANK 4
Seymour Bachmuth and Horace
Y. Mochizuki
TWO-GENERATOR GROUPS III
J. L. Brenner, R. M. Guralnick, and James Wiegold
THE SUBGROUP SEPARABILITY OF FREE PRODUCTS OF TWO FREE GROUPS WITH
44
50
79
82
CYCLIC AMALGAMATION . . . . . . . . . . . . . . . . . . . 90
A. M. Brunner, R. G. Burns and D. Solitar
ANOTHER PROOF OF THE GRUSHKO-NEUMANN-WAGNER THEOREM FOR FREE
PRODUCTS . . . . . . . . . . . . . . . . . . . . . . . 116
R. G. Burns and T. C. Chau
ON VARIETAL ANALOGS OF HIGMAN'S EMBEDDING THEOREM •......•.. 134
Frank B. Cannonito
ON THE WHITEHEAD METHOD IN FREE PRODUCTS
Donald J. Collins and Heiner Zieschang
............. 141
QUADRATIC PARAMETRIC EQUATIONS OVER FREE GROUPS . . . . . . . . . . 159
Leo P. Comerford, Jr. and Charles C. Edmunds
FINITE GROUPS OF OUTER AUTOMORPHISMS OF A FREE GROUP . . . . . . . 197
Marc Culler
ix
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