Results 61 to 70 of about 769 (170)

Global eigenfamilies on closed manifolds

Journal of the London Mathematical Society, Volume 112, Issue 2, August 2025.
Abstract We study globally defined (λ,μ)$(\lambda,\mu)$‐eigenfamilies on closed Riemannian manifolds. Among others, we provide (non‐)existence results for such eigenfamilies, examine topological consequences of the existence of eigenfamilies and classify (λ,μ)$(\lambda,\mu)$‐eigenfamilies on flat tori. It is further shown that for f=f1+if2$f=f_1+i f_2$
Oskar Riedler, Anna Siffert
wiley   +1 more source

Birational complexity and dual complexes

Proceedings of the London Mathematical Society, Volume 131, Issue 2, August 2025.
Abstract We introduce the notion of birational complexity of a log Calabi–Yau pair. This invariant measures how far the log Calabi–Yau pair is from being birational to a toric pair. We study fundamental properties of the new invariant, with a particular focus on the geometry of dual complexes.
Mirko Mauri, Joaquín Moraga
wiley   +1 more source

CR$CR$ analysis via local uniform completion, a sharp maximum modulus principle and holomorphic extension

Journal of the London Mathematical Society, Volume 111, Issue 5, May 2025.
Abstract Using iterated uniform local completion, we introduce a notion of continuous CR$CR$ functions on locally closed subsets of reduced complex spaces, generalising both holomorphic functions and CR$CR$ functions on CR$CR$ submanifolds. Under additional assumptions of set‐theoretical weak pseudo‐concavity, we prove optimal maximum modulus ...
Mauro Nacinovich, Egmont Porten
wiley   +1 more source

Invariant submanifolds of metric contact pairs [PDF]

, 2017
We show that (Formula presented.)-invariant submanifolds of metric contact pairs with orthogonal characteristic foliations make constant angles with the Reeb vector fields.
Hadjar, Amine, PIU, MARIA PAOLA
core   +3 more sources

Viscoelasticity, logarithmic stresses, and tensorial transport equations

Mathematical Methods in the Applied Sciences, Volume 48, Issue 3, Page 2934-2953, February 2025.
We introduce models for viscoelastic materials, both solids and fluids, based on logarithmic stresses to capture the elastic contribution to the material response. The matrix logarithm allows to link the measures of strain, that naturally belong to a multiplicative group of linear transformations, to stresses, that are additive elements of a linear ...
Gennaro Ciampa, Giulio G. Giusteri, Alessio G. Soggiu   +2 more
wiley   +1 more source

Invariant Variational Problems and Invariant Flows via Moving Frames [PDF]

, 2007
This paper reviews the moving frame approach to the construction of the invariant variational bicomplex. Applications include explicit formulae for the Euler-Lagrange equations of an invariant variational problem, and for the equations governing the ...

core  

The index and certain stability of minimal anti invariant submanifolds in Sasakian and Kähler Manifolds

Tsukuba Journal of Mathematics, 2001
The author derives a formula for the index form associated to the volume of a compact orientable minimal submanifold \(P\) of a Sasakian manifold \(M\), where the submanifold \(P\) is assumed to be orthogonal to the structure vector field of \(M\). Using this formula, stability questions are investigated.
openaire   +2 more sources

ON SEMI-INVARIANT SUBMANIFOLDS OF ALMOST COMPLEX CONTACT METRIC MANIFOLDS [PDF]

, 2017
In this article we study semi-invariant submanifolds of almost complexcontact metric manifolds.We defined semi-invariant submanifolds of almostcomplex contact metric manifold and we have investigated semi-invariantsubmanifolds of almost complex contact ...
Yıldırım, Cumali, Erdoğan, Feyza Esra   +1 more
core  

Semi-Invariant Submanifolds A Lorentzian Kenmotsu Manifold With Semi-Symmetric Metric Connection [PDF]

, 2021
In this paper, semi-invariant submanifolds of a lorentzian Kenmotsu manifold endowed with a semi-symmetric metric connection are studied. Necessary and sufficient conditions are given on a submanifold of a lorentzian Kenmotsu manifold to be semi ...
Ünal, İnan, Sarı, Ramazan
core  

Invariant, anti invariant and slant submanifolds of locally poly-norden manifolds

Boletim da Sociedade Paranaense de Matemática
In this paper, we study locally almost 3-poly-Norden manifolds and prove several properties of the curvature tensor and Ricci tensor of these manifolds. We investigate invariant, anti-invariant and slant submanifolds of almost 3-poly-Norden manifolds from various views. We characterize these submanifolds and give non-trivial examples.
Masoumeh Tofighi, Mohammad Bagher Kazemi Balgeshir   +1 more
openaire   +1 more source