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The aim of this paper is to give an overview of the spectral theories associated with the notions of holomorphicity in dimension greater than one. A first natural extension is the theory of several complex variables whose Cauchy formula is…

Spectral Theory · Mathematics 2020-11-24 Fabrizio Colombo , Jonathan Gantner , Stefano Pinton

The classical Duhamel principle, established nearly 200 years ago by Jean-Marie-Constant Duhamel, reduces the Cauchy problem for an inhomogeneous partial differential equation to the Cauchy problem for the corresponding homogeneous…

Classical Analysis and ODEs · Mathematics 2010-04-14 Sabir Umarov

In this note, we introduce a suitable generalization of the momentum map for nonholonomic field theories and prove a covariant form of the nonholonomic momentum equation. We show that these covariant objects coincide with their counterparts…

Mathematical Physics · Physics 2007-05-23 Joris Vankerschaver

Ultrasound modulation of electrical or optical properties of materials offers the possibility to devise hybrid imaging techniques that combine the high electrical or optical contrast observed in many settings of interest with the high…

Analysis of PDEs · Mathematics 2012-01-05 Guillaume Bal

This paper aims to investigate properties associated with fractional integral operators involving the three-parameters Mittag-Leffler function in the kernels with respect to another function. We prove that the Cauchy problem and the…

Classical Analysis and ODEs · Mathematics 2020-07-13 D. S. Oliveira

We study an intrinsic volume form defined on a pseudoconvex hypersurface in a complex Calabi-Yau manifold. We compute first and second variation formulae and discuss possible analogues of the affine isoperimetric inequality. In the last…

Differential Geometry · Mathematics 2023-05-18 Simon Donaldson , Fabian Lehmann

We investigate differentiability of functions defined on regions of the real quaternion field and obtain a noncommutative version of the Cauchy-Riemann conditions. Then we study the noncommutative analog of the Cauchy integral as well as…

Complex Variables · Mathematics 2007-05-23 S. V. Ludkovsky , F. van Oystaeyen

In this paper, first we give the notion of a compatible $3$-Lie algebra and construct a bidifferential graded Lie algebra whose Maurer-Cartan elements are compatible $3$-Lie algebras. We also obtain the bidifferential graded Lie algebra…

Rings and Algebras · Mathematics 2024-12-18 Shuai Hou , Yunhe Sheng

The main objective of this article is a constructive generalization of the holomorphic power and Laurent series expansions in C to dimension 3 using the framework of hypercomplex function theory. For this reason, deals the first part of…

Complex Variables · Mathematics 2010-07-13 Sebastian Bock

After Bershadsky-Cecotti-Ooguri-Vafa, we introduce an invariant of Calabi-Yau threefolds, which we call the BCOV invariant and which we obtain using analytic torsion. We give an explicit formula for the BCOV invariant as a function on the…

Differential Geometry · Mathematics 2008-10-31 Hao Fang , Zhiqin Lu , Ken-Ichi Yoshikawa

The closed form integral representation for the projection onto the subspace spanned by bound states of the two-body Coulomb Hamiltonian is obtained. The projection operator onto the $n^2$ dimensional subspace corresponding to the $n$-th…

Atomic Physics · Physics 2011-05-10 O. M. Deryuzhkova , S. B. Levin , S. L. Yakovlev

We study the nonhomogeneous boundary value problem for the Navier-Stokes equations of steady motion of a viscous incompressible fluid in arbitrary bounded multiply connected plane or axially-symmetric spatial domains. We prove that this…

Mathematical Physics · Physics 2013-02-05 Mikhail. V. Korobkov , Konstantin Pileckas , Remigio Russo

In classical complex analysis analyticity of a complex function $f$ is equivalent to differentiability of its real and imaginary parts $u$ and $v$, respectively, together with the Cauchy-Riemann equations for the partial derivatives of $u$…

Functional Analysis · Mathematics 2019-06-24 S ter Horst , E. M. Klem

The goal of this paper is to formalize the notion of The Compositional Integral in The Complex Plane. We prove a convergence theorem guaranteeing its existence. We prove an analogue of Cauchy's Integral Theorem--and suggest an approach at…

General Mathematics · Mathematics 2020-11-03 James David Nixon

We generalise the Atiyah-Segal-Singer fixed point theorem to noncompact manifolds. Using $KK$-theory, we extend the equivariant index to the noncompact setting, and obtain a fixed point formula for it. The fixed point formula is the…

K-Theory and Homology · Mathematics 2018-04-04 Peter Hochs , Hang Wang

We deal with the 3D inviscid Leray-{\alpha} model. The well posedness for this problem is not known; by adding a random perturbation we prove that there exists a unique (in law) global solution. The random forcing term formally preserves…

Probability · Mathematics 2014-11-17 David Barbato , Hakima Bessaih , Benedetta Ferrario

This paper considers the Cauchy problem for the nonlinear dynamic string equation of Kirchhoff-type with time-varying coefficients. The objective of this work is to develop a time domain discretization algorithm capable of approximating a…

Analysis of PDEs · Mathematics 2024-04-09 Jemal Rogava , Zurab Vashakidze

In this paper, we proved the generalized Hyers-Ulam stability of homomorphisms in $C^*$- ternary algebras and of derivations on $C^*$-ternary algebras for the following Cauchy- Jensen functional equation…

Mathematical Physics · Physics 2011-01-04 Choonkil Park , John Michael Rassias , Won-Gil Park

We study the three-dimensional Cauchy problem for a non-isothermal compressible nematic liquid crystal system with far-field vacuum. By deriving refined energy estimates and exploiting the coupled structure of the equations, we establish…

Analysis of PDEs · Mathematics 2025-12-30 Lin Xu , Xin Zhong

In a number of papers, Y. Sternfeld investigated the problems of representation of continuous and bounded functions by linear superpositions. In particular, he proved that if such representation holds for continuous functions, then it holds…

Functional Analysis · Mathematics 2015-01-22 Vugar Ismailov