## HOUSTON JOURNAL OF MATHEMATICS

### Archived Edition
Vol. 13, No. 3, 1987

*Editors*: H. Brezis (Paris), J. Hausen (Houston), J.A. Johnson (Houston), B. Jóhnson (Nashville), A. Lelek (Houston), J. Nagata (Osaka), J.W. Neuberger (Emory), B.H. Neumann (Australian National University), G.-C. Rota (MIT)

*Managing Editor*: G.G. Johnson (Houston)

Houston Journal of Mathematics

*Contents*

**Joseph Barback
**

Corrections for Two Papers: ``On Tame Regressive Isols'' and ``Tame Models in the Isols'', pp. 301-302.

**Gerald Beer
**

Lattice-Semicontinuous Mappings and Their Application, pp. 303-318.

**Bruce D. Calvert
**

Characterizing a Space Which Is Euclidean Near a Two-Dimensional Subspace, pp.
319-335.

**Robert Stephen Cantrell, Chris Cosner
**

On the Steady-State Problem for the Volterra-Lotka Competition Model With Diffusion, pp. 337-352.

**J. Scott Carter
**

Simplifying the Self Intersection Sets of Codimension One Immersions, pp. 353-366.

**James Hatzenbuhler, Don A. Mattson
**

The Cantor Set As a Remainder of X x Y, pp.
367-371.

**S. D. Iliadis
**

The Rim-Type of Spaces and the Property of Universality, pp. 373-388.

**L. Brian Lawrence
**

Connected Function Graphs Defined by Countable Partially Ordered Subsets of the Plane, pp.
389-403.

**Suzanne M. Lenhart
**

Viscosity Solutions Associated With Switching Control Problems for Piecewise-Deterministic Processes, pp. 405-426.

**J. S. Okon, L. J. Ratliff, Jr.
**

Notes on Analytic Spread and Certain Sequences, pp.
427-441.

**Edwin P. Oxford
**

Representable Preradicals, pp. 443-453.