On a problem of S. Ulam
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- by Gilles Fournier PDF
- Proc. Amer. Math. Soc. 29 (1971), 622 Request permission
Abstract:
Giving a negative answer to a problem of S. Ulam, the author provides an example of two noncomplete subspaces of R which are not isometric but whose squares are isometric.References
- S. M. Ulam, A collection of mathematical problems, Interscience Tracts in Pure and Applied Mathematics, no. 8, Interscience Publishers, New York-London, 1960. MR 0120127
Additional Information
- © Copyright 1971 American Mathematical Society
- Journal: Proc. Amer. Math. Soc. 29 (1971), 622
- MSC: Primary 54.35
- DOI: https://doi.org/10.1090/S0002-9939-1971-0278262-5
- MathSciNet review: 0278262