Results 101 to 110 of about 500,170 (139)

Parallel Inversion of 3D Airborne Transient Electromagnetic Data Using an Approximate Jacobi Matrix

Remote Sensing
In geophysical inversion issues, the Jacobian matrix computation takes the greatest time, and it is the most significant factor limiting the inversion’s calculation speed.
Da Lei, Hao Ren, Ruo Wang, Zhongxing Wang, Changmin Fu   +4 more
doaj   +1 more source

A New Inverse Eigenvalue Problem for Jacobi Matrices and Corresponding Mass-Spring System

پژوهش‌های ریاضی, 2020
Introduction Many problems in sciences and engineering can be studied by mathematical models. These models are classified as direct problems and inverse problems.
Hanif Mirzaei
doaj  

Ambarzumian-type mixed inverse spectral problems for Jacobi matrices [PDF]

We investigate Ambarzumian-type mixed inverse spectral problems for Jacobi matrices. Specifically, we examine whether the Jacobi matrix can be uniquely determined by knowing all but the first $m$ diagonal entries and a set of $m$ ordered eigenvalues.6 ...
Rapaka, Tarun, Ning, Steven, Luo, Ethan, Zheng, Xuxuan Joyce   +3 more
core  

On new relations between spectral properties of Jacobi matrices and their coefficients

, 2003
We study the spectral properties of Jacobi matrices. By using ``higher order'' trace formulae we obtain a result relating the properties of the elements of Jacobi matrices and the corresponding spectral measures.
Laptev, Ari,, Safronov, O., Naboko, S.
core   +1 more source

Spectral representations for a class of banded Jacobi-type matrices

Tyt. z nagłówka.Bibliogr. s. 885-887.We describe some spectral representations for a class of non-self-adjoint banded Jacobi-type matrices. Our results extend those obtained by P.B.
Zalot, Ewelina.
core  

Cantor spectrum of CMV matrices, Jacobi matrices and Schrodinger operators with dynamically defined coefficients and potentials

, 2020
In this thesis, we consider CMV matrices, Jacobi matrices and Schr\"{o}dinger operators while assuming that the coefficients and potentials are generated by dynamical systems. One of the major parts investigates continuous cocycles arising from CMV and
Jun, Hyunkyu
core  

Spectral problems for generalized Jacobi matrices

, 2004
A new class of generalized Jacobi matrices is introduced. Every proper real rational function is proved to be the m-function of a unique finite generalized Jacobi matrix.
Derkach, Vladimir, Derevyagin, Maxim
core   +1 more source

A Spectral Approach to Solve High-Order Ordinary Differential Equations: Improved Operational Matrices for Exponential Jacobi Functions

Mathematics
This paper presents a novel numerical approach to handling ordinary differential equations (ODEs) with initial conditions (ICs) by introducing generalized exponential Jacobi functions (GEJFs). These GFJFs satisfy the associated ICs.
Hany Mostafa Ahmed
doaj   +1 more source

Sum rules for jacobi matrices and their applications to spectral theory [PDF]

, 2003
We discuss the proof of and systematic application of Case's sum rules for Jacobi matrices. Of special interest is a linear combination of two of his sum rules which has strictly positive terms.
Barry Simon, Rowan Killip
core  

Schrift- und Vernunft-mäßige Beweise, Daß die Sünde die eigentliche Ursache des Todes sey / gegen die neuesten Einwürfe vertheidiget von Johann Friedrich Bahrdt, der Heil. Schrift Doctore und Professore zu Leipzig, des Consistorii daselbst Assessore und Prediger zu St. Petri.

Autopsie nach Ex.
Bahrdt, Johann Friedrich
core   +1 more source