# Volume 23 Number 1 April 1994

### From NZJM

NZ J. Mathematics Vol. 23 (1994) Here is the table of contents of part 1 of Volume 23 of the New Zealand Journal of Mathematics:

D.D. Bainov, M.B. Dimitrova and A.D. Myshkis

Oscillatory and asymptotic properties of the solutions of a class of operator-differential equations pp. 1-10.

Scott W. Brown

Lomonosov's theorem and essentially normal operators pp. 11-18.

Urban Cegrell

The green function and a generalized corona problem in one complex variable pp. 19-23.

Chew Tuan-Seng and Lee Peng-Yee

Nonabsolute integration using Vitali covers pp. 25-36.

A.A. Darwish

The inverse scattering problem for a singular boundary value problem pp. 37-56.

Horst W. Gerlach

A note on closure properties of sets of false witnesses pp. 57-64.

A. Hinkkanen

Completely invariant components in the punctured plane pp. 65-69.

Hajime Ishihara

A constructive version of Banach's inverse mapping theorem pp. 71-75.

Gaven Martin

The persistence of angle pp. 77-82.

Paola Morando and Stefano Pasquero

A short proof of the Wedderburn-Artin theorem pp. 83-90.

Wilhelm Schwick

On a normality criterion of H.L. Royden pp. 91-92.

R.K. Sharma and J.B. Srivastava

Strongly prime group rings pp. 93-98.