نتایج جستجو برای: characteristic equation

تعداد نتایج: 399113  

2008
Dmitry Pelinovsky Anton Sakovich

We prove global well-posedness of the short-pulse equation with small initial data in Sobolev spaceHs for an integer s ≥ 2. Our analysis relies on local well-posedness results of Schäfer & Wayne [12], the correspondence of the short-pulse equation to the sine– Gordon equation in characteristic coordinates, and a number of conserved quantities of the short-pulse equation. We also prove local and...

1956
András Prékopa

Several investigations has recently been made concerning Poisson and composed Poisson stochastic processes. The ordinary Poisson process is conceivable as a sequence of points, distributed at random on the time axis and this idea can be generalized to more than onedimensional spaces. The latter case occurs in making a blood-count, in counting stars, etc. In [8], [4], [6] and [15] conditions are...

2009
KAREN YEATS

Characteristic points have been a primary tool in the study of a generating function defined by a single recursive equation. We investigate the proper way to adapt this tool when working with multi-equation recursive systems.

2005
Yuri N. Fedorov Dmitry V. Zenkov

This papers studies discrete nonholonomic mechanical systems whose configuration space is a Lie group G Assuming that the discrete Lagrangian and constraints are left-invariant, the discrete Euler–Lagrange equations are reduced to the discrete Euler–Poincaré–Suslov equations. The dynamics associated with the discrete Euler–Poincaré–Suslov equations is shown to evolve on a subvariety of the Lie ...

Journal: :CoRR 2013
Joël Ouaknine James Worrell

We consider two computational problems for linear recurrence sequences (LRS) over the integers, namely the Positivity Problem (determine whether all terms of a given LRS are positive) and the effective Ultimate Positivity Problem (determine whether all but finitely many terms of a given LRS are positive, and if so, compute an index threshold beyond which all terms are positive). We show that, f...

Journal: :Mathematics and Computers in Simulation 2003
E. F. Kaasschieter A. J. H. Frijns J. M. Huyghe

Swelling and shrinking of cartilaginous tissues is modelled by a four-component mixture theory. This theory results in a set of coupled non-linear partial differential equations for the electro-chemical potentials and the displacement. For the sake of local mass conservation these equations are discretised in space by a mixed finite element method. Integration in time by backward Euler leads to...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 1938
H Bateman

bras of index m = 3. Here we have to consider only the linear equation P1 = 0 in (6). Without any further adjunction, we obtain an element A * 0 in D, with a characteristic equation x3 h3 = 0. This gives Wedderburn's result that all normal division algebras of index 3 are cyclic. In the case m = 4, we again consider only the equation P1 = 0 instead of (6). We obtain an element A * 0 in D, which...

2001
S. KHARIBEGASHVILI

The correct formulation of a characteristic problem and a Darboux type problem in the special weighted functional spaces for an ultrahyperbolic equation is investigated. In the space of variables x1, x2, y1 and y2 we consider the ultrahyperbolic equation uy1y1 + uy2y2 − ux1x1 − ux2x2 = F. (1) Denote by D : −y1 < x1 < y1, 0 < y1 < +∞, a dihedral angle bounded by the characteristic surfaces S1 : ...

Let $K$ be a field of characteristic$p>0$, $K[[x]]$, the ring of formal power series over $ K$,$K((x))$, the quotient field of $ K[[x]]$, and $ K(x)$ the fieldof rational functions over $K$. We shall give somecharacterizations of an algebraic function $fin K((x))$ over $K$.Let $L$ be a field of characteristic zero. The power series $finL[[x]]$ is called differentially algebraic, if it satisfies...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2004
J P Huang

The mesocrystal showing both electrorheological and magnetorheological effects is called electro-magnetorheological (EMR) solids. Prediction of the overall magnetic properties of the EMR solids is a challenging task due to the coexistence of the uniaxially anisotropic behavior and structural transition as well as long-range interaction between the suspended particles. To consider the uniaxial a...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید