O čtvrtém Hilbertově problému
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Displaying 1 – 20 of 791
O geometrii laplasiánu. I
Oldřich Kowalski (1981)
Pokroky matematiky, fyziky a astronomie
O geometrii laplasiánu. II
Oldřich Kowalski (1981)
Pokroky matematiky, fyziky a astronomie
O integrální geometrii
Zbyněk Nádeník (1962)
Pokroky matematiky, fyziky a astronomie
Obata’s Rigidity Theorem for Metric Measure Spaces
Christian Ketterer (2015)
Analysis and Geometry in Metric Spaces
We prove Obata’s rigidity theorem for metric measure spaces that satisfy a Riemannian curvaturedimension condition. Additionally,we show that a lower bound K for the generalizedHessian of a sufficiently regular function u holds if and only if u is K-convex. A corollary is also a rigidity result for higher order eigenvalues.
Observations on harmonic maps and singular varieties
Brendon Lasell, Mohan Ramachandran (1996)
Annales scientifiques de l'École Normale Supérieure
On 1-harmonic functions.
Wei, Shihshu Walter (2007)
SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]
On -dimensional Riemannian manifolds with positive scalar curvature
Domenico Perrone (1984)
Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni
In questo lavoro si danno alcuni risultati sugli spettri degli operatori di Laplace per varietà Riemanniane compatte con curvatura scalare positiva e di dimensione . Ad essi si aggiunge una osservazione riguardante la congettura di Yamabe.
On 2-framed Riemannian manifolds with Godbillon-Vey structure form.
Buchner, K., Roşca, R. (2000)
Balkan Journal of Geometry and its Applications (BJGA)
On 2-quasi-umbilical pseudosymmetric hypersurfaces in the Euclidean space.
Özgür, Cihan (2007)
Bulletin of the Malaysian Mathematical Sciences Society. Second Series
On 3-dimensional CR-manifolds
Alois Švec (1979)
Sborník prací Přírodovědecké fakulty University Palackého v Olomouci. Matematika
On 3-dimensional generalized -contact metric manifolds.
Shaikh, A.A., Arslan, K., Murathan, C., Baishya, K.K. (2007)
Balkan Journal of Geometry and its Applications (BJGA)
On 3-Dimensional Riemannian ...-Spaces.
Oldrich Kowalski, Masami Sekizawa (1987)
Monatshefte für Mathematik
On 3-symmetric Riemannian spaces of solvable type
Aleksej Tralle (1989)
Commentationes Mathematicae Universitatis Carolinae
On -dimensional Lie groups as quasi-Kähler manifolds with Killing Norden metric.
Mekerov, Dimitar, Manev, Mancho (2008)
Novi Sad Journal of Mathematics
On 4-dimensional locally conformally flat almost Kähler manifolds
Wiesław Królikowski (2006)
Archivum Mathematicum
Using the fundamental notions of the quaternionic analysis we show that there are no 4-dimensional almost Kähler manifolds which are locally conformally flat with a metric of a special form.
On a Bianchi-type identity for the almost hermitian manifolds
Giovanni Battista Rizza (1988)
Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni
Almost hermitian manifolds, whose Riemann curvature tensor satisfies an almost complex Bianchi-type identity, are considered. Some local and global theorems are proved. The special cases of parakähler manifolds and of Kähler manifolds are examined.
On a borderline class of non-positively curved compact Kähler manifolds.
S.-T. Yau, F. Zheng (1993)
Mathematische Zeitschrift
On a Carathéodory's conjecture on umbilics : representing ovaloids
Carlos Gutierrez, Federico Sánchez-Bringas (1997)
Rendiconti del Seminario Matematico della Università di Padova
On a certain class of Riemannian homogeneous spaces
Takeshi Sumitomo (1972)
Colloquium Mathematicae
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