Document Type

Article

Publication Date

2-1-1980

Publication Title

Proceedings of the Edinburgh Mathematical Society

Volume

23

First Page Number

57

Last Page Number

59

DOI

10.1017/S0013091500003606

Publisher Statement

© 1980, Cambridge University Press. Available on publisher's site at http://dx.doi.org/10.1017/S0013091500003606.

Included in

Mathematics Commons

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