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Svoboda, Karel
Remark on surfaces in $E^4$ satisfying certain relations between covariant derivatives of the mean and Gauss curvatures. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 19 (1978), issue 4, pp. 619-626
MSC: 53A05, 53C40, 53C45 | MR 518175 | Zbl 0397.53044
References:
[1] A. ŠVEC: Contributions to the global differential geometry of surfaces. Rozpravy ČSAV 1, 87 (1977), 1-94. MR 0467608
[2] J. BUREŠ: Some remarks on surfaces in the $4$-dimensional Euclidean space. Czech. Math. Journal 25 (100) (1975), 480-490. MR 0388283
[3] K. SVOBODA: Several new characterizations of the $2$-dimensional sphere in $E^4$ . Czech. Math. Journal, to appear. MR 0548220
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