*Editors*: H. Brezis (Paris), S.S. Chern (Berkeley), J. Damon (Chapel Hill), R.M. Hardt (Rice), G.G. Johnson (Houston), J.A. Johnson (Houston), A. Lelek (Houston), J. Nagata (Osaka), B.H. Neumann (Australian National University), V. Paulsen (Houston), G. Pisier (College Station and Paris), G.-C. Rota (MIT), R. Scott (Houston), K. Uhlenbeck (Austin)
*Managing Editor*: G. Auchmuty (Houston)

Houston Journal of Mathematics

*Contents*

**Edward Formanek
**

Observations About the Jacobian Conjecture, pp. 369-380.

**H. Pat Goeters
**

Quasi-Invariants for Torsion-Free Groups, pp. 381-392.

**Coy L. May
**

Groups of Small Real Genus, pp. 393-408.

**Eugene Curtin
**

Tautness for Manifolds With Boundary, pp. 409-424.

**R. deLaubenfels, M. Jazar
**

Commuting Multiplicative Perturbations, pp. 425-434.

**J. W. Kitchen, D. A. Robbins
**

Bundles of Banach Algebras, II, pp.
435-451.

**B. A. Mair, Scott McCullough
**

Invariance of Extreme Harmonic Functions on an Annulus; Applications to Theta Functions, pp.
453-473.

**D. Ye, F. Zhou
**

Minimizing Harmonic Mapping With Values in a Circle, pp. 475-490.

**Jan Mycielski
**

On the Existence of a Shortest Arc Between Two Points of a Metric Space, pp. 491-494.

**Jesus Garcia-Falset
**

Stability and Fixed Points for Nonexpansive Mappings, pp. 495-506.

**Katarzyna Tkaczynska
**

On the Span of Simple Closed Curves, pp. 507-528.

**Alejandro Illanes
**

R^{3}-Continua in Hyperspaces, pp. 529-538.

**L. Brian Lawrence
**

Infinite-Dimensional Countable Connected Hausdorff Spaces, pp. 539-546.

**Robert E. Beaudoin
**

An Application of Ultraproducts to Stone-Cech Compactifications, pp. 547-554.

**Mohammad K. Azarian
**

On the Near Frattini Subgroups of Certain Groups, pp. 555-560.