## HOUSTON JOURNAL OF MATHEMATICS

### Archived Edition
Vol. 4, No. 4, 1978

*Editors*: D.G. Bourgin (Houston), B. Jóhnson (Nashville), A. Lelek (Houston), J.S. Mac Nerney (Houston), J.W. Neuberger (Emory), B.H. Neumann (Australian National University), J. Schmidt (Houston)

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

*Associate Managing Editors*: J. Hausen (Houston), J.A. Johnson (Houston)

Houston Journal of Mathematics

*Contents*

**Reinhold Baer
**

The Embedding Relation Derived From a Formation, pp. 447-516.

**B. Banaschewski
**

Hulls, Kernels, and Continuous Lattices, pp.
517-525.

**Stephen L. Campbell, Nicholas J. Rose
**

Singular Perturbation of Autonomous Linear Systems III, pp.
527-539.

**Gunnar Carlsson
**

An Adams-Type Spectral Sequence for Change of Rings, pp. 541-550.

**David E. Dobbs
**

Coherence, Ascent of Going-Down, and Pseudo-Valuation Domains, pp.
551-567.

**Brian Kuttner, Mangalam R. Parameswaran
**

On the Generalized Hausdorff and Some Related Matrices, pp. 569-576.

**P. J. McKenna
**

On the Reduction of a Semilinear Hyperbolic Problem to a Landesman-Lazer Problem, pp.
577-581.

**D. S. Passman
**

Crossed Products Over Semiprime Rings, pp. 583-592.

**L. J. Ratliff, Jr., J. C. Robson
**

Minimal Bases for Modules, pp. 593-596.