On the magnitude of 
in a normed algebra
Author:
Lawrence J. Wallen
Journal:
Proc. Amer. Math. Soc. 18 (1967), 956
MSC:
Primary 46.50
DOI:
https://doi.org/10.1090/S0002-9939-1967-0216295-4
MathSciNet review:
0216295
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Additional Information
DOI:
https://doi.org/10.1090/S0002-9939-1967-0216295-4
Article copyright:
© Copyright 1967
American Mathematical Society
