Results 91 to 100 of about 84,048 (226)

Tuning NIR Absorption and Emission of Diphenyl‐Dihydrophenazine‐Based Merocyanines with Ultra Narrow Band Gap

Chemistry – A European Journal, Volume 31, Issue 42, July 25, 2025.
Novel merocyanine derivatives with a strong diphenyl‐dihydrophenazine donor and a series of strong electron acceptors were developed. The indanone and indandione acceptor units were modified by dicyanovinylene groups to tune acceptor strength. Among these derivatives, DPPZ‐IDD realized an ultranarrow electrochemical gap of 0.93 eV and an optical band ...
Kateřina Teichmanová, Stanislav Luňák Jr., Karel Pauk, Lukáš Střižík, Zdeňka Růžičková, Tomáš Mikysek, Klára Melánová, Aleš Imramovský, Kazuhiko Nagura   +8 more
wiley   +1 more source

Construction of the field of Norden — Timofeev planes of hypersurfacese quipped with distributions

Дифференциальная геометрия многообразий фигур, 2018
In the projective space the research of a hypersurface with three stron­gest mutual subbundles continues. The field of the invariant Norden — Ti­mofeev planes is constructed that is internally attached to the hypersurface.
N. Eliseeva
doaj  

On the Minimal Hypersurfaces

Communications, Faculty Of Science, University of Ankara Series A1Mathematics and Statistics, 1983
In this paper the Euler’s theorem and some corollaries for minimal hypersurfaces are ob- tained. Moreover characterizations for asymptotic curves on the minimal hypersurfaces and surfaces are given. On the other hand a theorem, on the conjugate minimal surfaces, is also gi­ ven.
B. Karliğa, Hilmi H. Hacisalihoğlu
openaire   +3 more sources

Abstract Conformer Space

Helvetica Chimica Acta, Volume 108, Issue 7, July 2025.
Proteins are intrinsically flexible and thus require an ensemble description. In abstract conformer space, ensemble diversity is easier to assess and the required ensemble size can be established. Abstract Pairwise distance root mean square deviation defines a hyperspace where conformers with similar shape reside close to each other.
Gunnar Jeschke
wiley   +1 more source

Maximum principles for hypersurfaces with vanishing curvature functions in an arbitrary Riemannian manifold

Anais da Academia Brasileira de Ciências, 2002
In this paper we generalize and extend to any Riemannian manifold maximum principles for Euclidean hypersurfaces with vanishing curvature functions obtained by Hounie-Leite.Neste trabalho nós generalizamos e estendemos para uma variedade Riemanniana ...
FRANCISCO X. FONTENELE, SÉRGIO L. SILVA
doaj   +1 more source

General infinitesimal variations of the Hodge structure of ample curves in surfaces

Mathematische Nachrichten, Volume 298, Issue 7, Page 2282-2308, July 2025.
Abstract Given a smooth projective complex curve inside a smooth projective surface, one can ask how its Hodge structure varies when the curve moves inside the surface. In this paper, we develop a general theory to study the infinitesimal version of this question in the case of ample curves.
Víctor González‐Alonso, Sara Torelli
wiley   +1 more source

Dupin hypersurfaces

Mathematische Annalen, 1985
A surface in 3-space is a cyclide of Dupin if and only if along each line of curvature the corresponding principal curvature is constant. Accordingly a hypersurface in n-space is called a ''Dupin hypersurface'' if the principal curvatures are constant along the leaves of the corresponding curvature foliations.
openaire   +1 more source

Some submersions of CR-hypersurfaces of Kaehler-Einstein manifold

International Journal of Mathematics and Mathematical Sciences, 2003
The Riemannian submersions of a CR-hypersurface M of a Kaehler-Einstein manifold M˜ are studied. If M is an extrinsic CR-hypersurface of M˜, then it is shown that the base space of the submersion is also a Kaehler-Einstein manifold.
Vittorio Mangione
doaj   +1 more source

Modeling the boundaries of the working space of a planar three-link manipulator [PDF]

Омский научный вестник
A study of the boundaries of the working space of a three-link planar manipulator, specified by analytical equations, is carried out. A new geometric interpretation of these samples is proposed. On its basis, it is established that outer space consists
T. A. Sheveleva, A. A. Lyashkov
doaj   +1 more source

Hypersurfaces in a Euclidean space with a Killing vector field

AIMS Mathematics
An odd-dimensional sphere admits a killing vector field, induced by the transform of the unit normal by the complex structure of the ambiant Euclidean space.
Mohammed Guediri, Sharief Deshmukh
doaj   +1 more source