HOUSTON JOURNAL OF
MATHEMATICS

Archived Edition Vol. 5, No. 3, 1979

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

E. Z. Andalafte, J. E. Valentine, S. G. Wayment
Triangle Median Properties Which Characterize Banach Spaces, pp. 307-312.

David P. Bellamy
Homeomorphisms of Composants, pp. 313-318.

Bang-Yen Chen
Extrinsic Spheres in Riemannian Manifolds, pp. 319-324.

Harvey Friedman
On the Naturalness of Definable Operations, pp. 325-330.

J. Grispolakis, E. D. Tymchatyn
Confluent Images of Rational Continua, pp. 331-337.

David Handel
Obstructions to 3-Regular Embeddings, pp. 339-343.

P. Krupski
Continua Which Are Homogeneous With Respect to Continuity, pp. 345-356.

Jimmie D. Lawson
The Duality of Continuous Posets, pp. 357-386.

Stephen Pierce
Divisibility Questions in the General Linear Group, pp. 387-394.

Eric E. Robinson
Inverse Systems for Light-Open Mappings Onto Polyhedra, pp. 395-406.

J. Wolfgang Smith
Compactly Generated Submersions, pp. 407-417.

William W. Smith
Erratum to ``Invertible Ideals and Overrings'', p. 419.

R. C. Thompson
Invariant Factors of Complementary Minors of Integral Matrices, pp. 421-426.

Constantine Tsinakis
Brouwerian Semilattices Determined by Their Endomorphism Semigroups, pp. 427-436.

Mary H. Upham
Two Remarks on Duality, pp. 437-443.

Nick Williams
Universe Developable Spaces, pp. 445-450.