The Rocky Mountain Journal of Mathematics is published by the Rocky Mountain Mathematics Consortium. The journal publishes both research and expository articles in mathematics, and particularly invites well-written survey articles. In addition, the journal publishes specialized conference proceedings.

### Volume 21, Number 3

#### Publication Date: Summer 1991

Review Article Generalizations of the Gleason-Kahane-Żelazko Theorem

Krzysztof Jarosz; 915-921

Survey Article Riemann Integration in Banach Spaces

Russell Gordon; 923-949

Orthomodular Lattices and Quadratic Spaces: A Survey

Robert Piziak; 951-992

L.E. Bobisud; 993-1007

A Switch in Nodal Structure in Coupled Systems of Nonlinear Sturm-Liouville Boundary Value Problems

Robert Stephen Cantrell; 1009-1029

A Simple Continued Fraction Test for the Irrationality of Functions

On Iterated Torsion Products of Abelian $p$-Groups

Patrick Keef; 1035-1056

Pseudo-Convergence in Normed Linear Spaces

Teck-Cheong Lim; 1057-1070

Full 2-Convexity in Bochner $\bf L^p$-Spaces

Pei-Kee Lin; 1071-1081

A Method for the Numerical Solution of a Class of Nonlinear Diffusion Equations

Luciano Lopez; 1083-1097

A Survey with Open Problems on Univalent Functions Whose Coefficients are Negative

Herb Silverman; 1099-1125

Focal Subfunctions and Second Order Differential Inequalities

S. Umamaheswaram and M. Venkata Rama; 1127-1141

Errata

1143

Errata for Volume 21, Number 2

1145-1195