The College Mathematics Journal, Vol. 21, No. 4 (Sep., 1990), pp. 327-329 (3 pages) ...
Proceedings of the National Academy of Sciences of the United States of America, Vol. 68, No. 9 (Sep., 1971), pp. 2025-2027 (3 pages) A study has been made of Cauchy's problem for a class of abstract ...
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