## HOUSTON JOURNAL OF MATHEMATICS

### Archived Edition
Vol. 10, No. 4, 1984

*Editors*: D.G. Bourgin (Houston), J. Hausen (Houston), G.G. Johnson (Houston), B. Jóhnson (Nashville), J.W. Neuberger (Emory), B.H. Neumann (Australian National University)

*Managing Editor*: A. Lelek (Houston)

*Associate Managing Editor*: J.A. Johnson

Houston Journal of Mathematics

*Contents*

**W. D. Collins, E. J. Vought
**

Continuum Chainability and Monotone Decompositions in Certain Classes of Unicoherent Continua, pp.
457-465.

**Henry Clay Fickle
**

Knots, Z-Homology 3-Spheres and Contractible 4-Manifolds, pp.
467-493.

**R. A. Heeg
**

A Theorem on Central Fixed Jordan Rings, pp.
495-501.

**M. E. Huss
**

The Lattice of Lattice Ordered Subgroups of a Lattice Ordered Group, pp.
503-505.

**Judy Kennedy
**

More on a Weaker Form of Countable Dense Homogeneity, pp. 507-524.

**James Kuzmanovich, Mark L. Teply
**

Semihereditary Monoid Rings, pp. 525-534.

**Claudio Morales
**

Existence Theorems for Demicontinuous Accretive Operators in Banach Spaces, pp.
535-543.

**William C. Nemitz
**

Extensions of Brouwerian Semilattices, pp. 545-558.

**Martha Smith
**

Eigenvectors of Automorphisms of Polynomial Rings in Two Variables, pp.
559-573.

**John Tiller
**

Convex Continuous Lattices, pp.
575-583.

**Philip C. Tonne
**

A Simple Closed Curve on a Hemisphere,
p. 585.

**L. E. Whitaker
**

A Countably Compact Extension Using Cores of Maximal Binding Families, pp.
587-591.

**D. Wilken, R. Hornblower
**

On the Support Points of Close-to-Convex Functions, pp. 593-599.