نتایج جستجو برای: degenerate

تعداد نتایج: 21178  

Journal: :Journal of High Energy Physics 2016

Journal: :Physical Review B 2018

Journal: :Journal of Physics: Conference Series 2010

Journal: :Transactions of the American Mathematical Society 2019

Journal: :SIAM J. Scientific Computing 2002
Robert Eymard Thierry Gallouët Raphaèle Herbin Anthony Michel

We propose a second order finite volume scheme for nonlinear degenerate parabolic equations. For some of these models (porous media equation, drift-diffusion system for semiconductors, ...) it has been proved that the transient solution converges to a steady-state when time goes to infinity. The present scheme preserves steady-states and provides a satisfying long-time behavior. Moreover, it re...

2010
Barbara Szomolay B. Szomolay

In this paper we study the asymptotic behavior of solutions to the damped, nonlinear vibration equation with self-interaction ü = −γu̇+m(‖∇u‖)∆u− δ|u|u+ f, which is known as degenerate if m(·) ≥ 0, and non-degenerate if m(·) ≥ m0 > 0. We would like to point out that, to the author’s knowledge, exponential decay for this type of equations has been studied just for the special cases of α. Our aim ...

2000
Valentina Corradi

In this note we reconsider the continuous time limit of the GARCH(1, 1) process. Let > k and p2 k denote, respectively, the cumulative returns and the volatility processes. We consider the continuous time approximation of the couple (> k , p2 k ). We show that, by choosing di!erent parameterizations, as a function of the discrete interval h, we can obtain either a degenerate or a non-degenerate...

2013
SU GAO

We define the Polish space R of non-degenerate rank-1 systems. Each non-degenerate rank-1 system can be viewed as a measurepreserving transformation of an atomless, σ-finite measure space and as a homeomorphism of a Cantor space. We completely characterize when two non-degenerate rank-1 systems are topologically isomorphic. We also analyze the complexity of the topological isomorphism relation ...

2009
Ralph Waldo Emerson

The inputs that satisfy these assumptions may be said to be non-degenerate; otherwise they are degenerate. Implementors are left to their own devices to handle degenerate cases. Some papers may not even list the degenerate inputs. Thus, Forrest [2] deplores the “plethora of special cases ... glossed over by theoretical algorithms”. Forrest, and also Sedgewick [6], calls this the “bugbear” of ge...

2008
Sergei Alexandrov Boris Pioline Frank Saueressig Stefan Vandoren

Finding the exact, quantum corrected metric on the hypermultiplet moduli space in Type II string compactifications on Calabi-Yau threefolds is an outstanding open problem. We address this issue by relating the quaternionic-Kähler metric on the hypermultiplet moduli space to the complex contact geometry on its twistor space. In this framework, Euclidean D-brane instantons are captured by contact...

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