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A characterization of the 2-sphere by eigenfunctions
Shiu Yuen Cheng
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Source: Crossref
Published: Mar 1, 1976
DOI: 10.1090/s0002-9939-1976-0405296-4
Open original source ↗Source abstract
The spheres in 3 - dim 3{\text { - dim}} Euclidean space are characterized by the fact that they have three 1st eigenfunctions with square sum equal to a constant.
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