BULLETIN volume 9 (1973) of the Australian Mathematical Society

Number J . B. Diaz and A remark on a mean value theorem of Alexander Welnstem

John G. Leschen in Generalized Axially Symmetric Potential Theory 1John H. Cozzens Twisted group rings and a problem of Faith 11D . G . G r e e n Extensions of a semilattice by an inverse semigroup 21J . A Graves and Embedding near domains 33

J . J . Malone Ian N. Stewart Finiteness conditions in soluble groups and Lie algebras 43B. B. Phadke Conditions for a plane projective metric to be a norm 49Michael D. A lder Remark on a theorem of E. H. Brown 55R. A . R. Monzo On categorical semigroups 61Edward Formanek The zero divisor question for supersolvable groups 69U. B. Tewar i and The algebra of functions with Fourier transforms in a given

A . K. Gupta function space 73Sidney A . Morris and Invariant metrics on free topological groups 83

H. B. T h o m p s o n Panayotis T h . Lambrinos Quasi proximal continuity 89O. F. Hughes A useful relationship in the conformal mapping of quadri­

laterals 99C. E. Au l l A generalization of a theorem of Aquaro 105Marvin W . Grossman Uniqueness of invariant means on certain introverted

spaces 109Ch in -Hung Ching Uniqueness and representation of a function in terms of its

translated averages 121Yeo Kok Chye Minimal generating sets for some wreath products of

groups 127Isidore Fleischer A final remark on extending to strict total orders in modules 137P. J . McCarthy Matchings in graphs 141

Abst rac ts of Austra lasian P h D theses A . R. Gifkins An algebraic approach to Runge-Kutta methods 145Harold Bevan T h o m p s o n Some existence problems in differential equations ap­

proached through functional analysis 147Geoffrey J . McLachlan The errors of allocation and their estimators in the two-

population discrimination problem 149Stephen K. M c K e e Orthogonal expansions and transforms of vector-valued

measures and functions 151Joseph Mendel Steiner Thermal convection in a non-newtonian fluid 153Peter M. Robinson The estimation of continuous-time systems using discrete

data 155Margaret A n n e Dow Maximum principles for some quasilinear degenerate

elliptic-parabolic operators 157

Bull. Aust ra l . Math. Soc. Vo l . 9 (1973) No. 1, pp. 1-159

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Publications The JOURNAL of the Australian Mathematical Society began publication in 1959, and now appears in two volumes, each of four parts, annually. Manu­scripts for publication should be sent to the Editor:

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