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We provide sufficient conditions for a mapping between two Banach spaces to be a diffeomorphism using the approach of an auxiliary functional and also by the aid of a duality mapping corresponding to a normalization function. We simplify…

泛函分析 · 数学 2018-09-17 Marek Galewski , Dušan Repovš

The aim of this paper is to prove a fixed point theorem on a generalised cone metric spaces for maps satisfying general contractive type conditions.

经典分析与常微分方程 · 数学 2016-10-04 Sudip Kumar Pal , Manojit Maity

We prove a Liouville-type theorem for biharmonic maps from a complete Riemannian manifold of dimension \(n\) that has a lower bound on its Ricci curvature and positive injectivity radius into a Riemannian manifold whose sectional curvature…

微分几何 · 数学 2018-08-03 Volker Branding

We present a general bijective approach to planar hypermaps with two main results. First we obtain unified bijections for all classes of maps or hypermaps defined by face-degree constraints and girth constraints. To any such class we…

组合数学 · 数学 2019-06-14 Olivier Bernardi , Eric Fusy

In this paper we investigate the principle of the generalised localisation for spectral expansions of the polyharmonic operator, which coincides with the multiple Fourier integrals summed over the domains corresponding to the surface levels…

经典分析与常微分方程 · 数学 2019-07-23 Anvarjon Ahmedov , Norashikin Abdul Aziz , Mohd Noriznan Mohtar

We show that Han's bijection when restricted to permutations can be carried out in terms of the cyclic major code and the cyclic inversion code. In other words, it maps a permutation $\pi$ with a cyclic major code $(s_1, s_2, ..., s_n)$ to…

组合数学 · 数学 2010-09-08 William Y. C. Chen , Neil J. Y. Fan , Teresa X. S. Li

We introduce a natural notion of holomorphic map between generalized complex manifolds and we prove some related results on Dirac structures and generalized Kaehler manifolds.

微分几何 · 数学 2015-05-13 Liviu Ornea , Radu Pantilie

There exists a homomorphism from the affine super Yangian to the completion of the universal enveloping algebra of $\widehat{\mathfrak{gl}}(m|n)$, called the evaluation map. In this paper, we show that this homomorphism is surjective. Via…

表示论 · 数学 2021-08-05 Mamoru Ueda

We prove a generalization of Kannan's fixed point theorem, based on a recent result of Vittorino Pata.

一般拓扑 · 数学 2012-12-18 Mitropam Chakraborty , S. K. Samanta

In this work, we extend the concepts of $p$-biharmonic maps and $p$-biharmonic hypersurfaces to provide a broader characterization of $(p,q)$-harmonic hypersurfaces and $(p,q)$-harmonic curves in Riemannian manifolds, including Einstein…

微分几何 · 数学 2026-03-26 Moustafa Tadj , Ahmed Mohammed Cherif , Fethi Latti

We present a general fixed point theorem which can be seen as the quintessence of the principles of proof for Banach's Fixed Point Theorem, ultrametric and certain topological fixed point theorems. It works in a minimal setting, not…

交换代数 · 数学 2013-04-02 Katarzyna Kuhlmann , Franz-Viktor Kuhlmann

We describe examples showing the sharpness of Fujita's conjecture on adjoint bundles also in the general type case, and use these examples to formulate related bold conjectures on pluricanonical maps of varieties of general type.

代数几何 · 数学 2022-06-28 Fabrizio Catanese

A foliation is said to admit a foliated contact structure if there is a codimension 1 distribution in the tangent space of the foliation such that the restriction to any leaf is contact. We prove a version of the Weinstein conjecture in the…

辛几何 · 数学 2015-09-18 Álvaro del Pino , Francisco Presas

Biharmonic maps between surfaces are studied in this paper. We compute the bitension field of a map between surfaces with conformal metrics in complex coordinates. As applications, we show that a linear map from Euclidean plane into…

微分几何 · 数学 2010-08-05 Ye-Lin Ou , Sheng Lu

In this paper we show some remarkable consequences of the method which proves that every bisymmetric, symmetric, reflexive, strictly monotonic binary map on a proper interval is continuous, in particular it is a quasi-arithmetic mean. Now…

经典分析与常微分方程 · 数学 2022-08-16 Pál Burai , Gergely Kiss , Patricia Szokol

We describe a general construction providing index theorems localizing the Chern classes of the normal bundle of a subvariety inside a complex manifold. As particular instances of our construction we recover both Lehmann-Suwa's…

复变函数 · 数学 2007-05-23 Marco Abate , Filippo Bracci , Francesca Tovena

In this paper, we present some fixed point results for generalized $\theta -\phi -$contraction in the framework of $\left( \alpha ,\eta \right)-$compete rectangular $b-$metric spaces. Further, we establish some fixed point theorems for this…

综合数学 · 数学 2020-07-15 Abdelkrim Kari , Mohamed Rossafi , El Miloudi Marhrani , Mohamed Aamri

We characterize homogeneous hypersurfaces in complex space forms which arise as critical points of a higher order energy functional. As a consequence, we obtain existence and non-existence results for $\mathbb{CP}^n$ and $\mathbb{CH}^n$,…

微分几何 · 数学 2024-04-25 José Miguel Balado-Alves

In this paper some generalized mappings due to L.B. Ciric over a generalized metric space have been studied with illustrative examples. Some theorems with necessary and sufficient conditions have been proved for such mappings on that space.

泛函分析 · 数学 2018-06-19 Kushal Roy , Mantu Saha

We study biharmonic maps and f-biharmonic maps from a round sphere $(S^2, g_0)$, the latter maps are equivalent to biharmonic maps from Riemann spheres $(S^2, f^{-1}g_0)$. We proved that for rotationally symmetric maps between rotationally…

微分几何 · 数学 2016-03-23 Ze-Ping Wang , Ye-Lin Ou , Han-Chun Yang