Isothermic surfaces and Hopf cylinders.

Preissler, Gabi

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Local quasitriangular Hopf algebras.

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On the curvatures of $(r + 1)$ -dimensional generalized time-like ruled surface.

Bektas, Mehmet (2003)

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Ruled W-surfaces in Minkowski 3-space $ℝ_{1}^{3}$ .

Abdel-Baky, R.A., Abd-Ellah, H.N. (2008)

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$(m + 1)$ -dimensional spacelike parallel $p_{i}$ -equidistant ruled surfaces in the Minkowski space $R_{1}^{n}$ .

Masal, Melek (2006)

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Ruled W-surfaces in Minkowski 3-space $ℜ_{1}^{3}$

Rashad A. Abdel-Baky, H. N. Abd-Ellah (2008)

Archivum Mathematicum

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In this paper, we study a spacelike (timelike) ruled W-surface in Minkowski 3-space which satisfies nontrivial relation between elements of the set ${K, K_{I I}, H, H_{I I}}$ , where $(K, H)$ and $(K_{I I}, H_{I I})$ are the Gaussian and mean curvatures of the first and second fundamental forms, respectively. Finally, some examples are constructed and plotted.

On a conjecture about the Gauss map of complete spacelike surfaces with constant mean curvature in the Lorentz-Minkowski space.

Chaves, Rosa M.B., Cueva Cândido, Cláudia (2004)

Beiträge zur Algebra und Geometrie

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Ruled W-surfaces in Minkowski 3-space $ℜ_{1}^{3}$

Rashad A. Abdel-Baky, H. N. Abd-Ellah (2008)

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Examples of liftings of Nichols algebras over racks.

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AMA. Algebra Montpellier Announcements [electronic only]

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Cubic form geometry for surfaces in $𝐒^{3} (1)$ .

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Beiträge zur Algebra und Geometrie

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Weak c*-Hopf algebras: the coassociative symmetry of non-integral dimensions

Gabriella Böhm, Kornél Szlachányi (1997)

Banach Center Publications

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By allowing the coproduct to be non-unital and weakening the counit and antipode axioms of a C*-Hopf algebra too, we obtain a selfdual set of axioms describing a coassociative quantum group, that we call a weak C*-Hopf algebra, which is sufficiently general to describe the symmetries of essentially arbitrary fusion rules. It is the same structure that can be obtained by replacing the multiplicative unitary of Baaj and Skandalis with a partial isometry. The algebraic properties, the existence...

Position vector of spacelike biharmonic curves in the Lorentzian Heisenberg group ${Heis}^{3}$ .

Turhan, Essin, Körpinar, Talat (2011)

Analele Ştiinţifice ale Universităţii “Ovidius" Constanţa. Seria: Matematică

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