Results 101 to 110 of about 15,675 (260)
A non-local approach to waves of maximal height for the Degasperis-Procesi equation
, 2018 We consider the non-local formulation of the Degasperis-Procesi equation $u_t+uu_x+L(\frac{3}{2}u^2)_x=0$, where $L$ is the non-local Fourier multiplier operator with symbol $m(\xi)=(1+\xi^2)^{-1}$.
Arnesen, Mathias Nikolai
core
On a Problem of Jaak Peetre Concerning Pointwise Multipliers of Besov Spaces [PDF]
, 2017 Van Kien Nguyen, Winfried Sickel
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Heteroskedastic Structural Vector Autoregressions Identified via Long‐Run Restrictions
Oxford Bulletin of Economics and Statistics, EarlyView.ABSTRACT A central assumption for identifying structural shocks in vector autoregressive (VAR) models via heteroskedasticity is the time‐invariance of the impact effects of the shocks. It is shown how that assumption can be tested when long‐run restrictions based on the cointegration structure of the variables are available for identifying structural ...
Martin Bruns, Helmut Lütkepohl
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Confidence Intervals for Price Discovery
Oxford Bulletin of Economics and Statistics, EarlyView.ABSTRACT This paper discusses asymptotic and bootstrap confidence intervals for multivariate permanent‐transitory decompositions of cointegrated vector autoregressive I(1) systems, with a focus on price discovery. Alternative estimators of the permanent components are compared in terms of efficiency also under separable linear restrictions on the ...
Heino Bohn Nielsen +2 more
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Least Trimmed Squares: Cointegration and Outliers
Oxford Bulletin of Economics and Statistics, EarlyView.ABSTRACT When applying the cointegrated autoregressive distributed lag model it is common to include indicator variables for outliers. This is often done in a somewhat ad hoc way. Least Trimmed Squares estimation provides a more systematic approach. This estimator is robust to a large number of outliers of many types.
Vanessa Berenguer‐Rico, Bent Nielsen
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Analysis of Models to Estimate Morbidity Rates of Respiratory Diseases Through Deep Learning
Tropical Medicine &International Health, EarlyView.ABSTRACT Respiratory diseases remain a challenge in Brazil due to socioeconomic inequalities and environmental risks that intensify population vulnerability. This study compared XGBoost with a deep learning model using stacked Gated Recurrent Units (GRU), trained with morbidity data from respiratory diseases and exogenous variables such as per capita ...
Liliane Moreira Nery +6 more
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A Schur multiplier characterization of coarse embeddability
, 2015 We give a contractive Schur multiplier characterization of locally compact groups coarsely embeddable into Hilbert spaces. Consequently, all locally compact groups whose weak Haagerup constant is 1 embed coarsely into Hilbert spaces, and hence the Baum ...
Knudby, Søren, Li, Kang
core
Global Change Biology Communications, Volume 1, Issue 2, June 2026.Seedling counts over 26 years revealed that wetter‐site temperate tree species struggle to recruit in warmer, drier years, whereas drier‐site species are more climate‐tolerant. Shadier forests buffered seedlings from heat and drought. Local soils and canopy cover strongly shaped outcomes, revealing considerable differences among species in climate ...
Bailey H. McNichol, Richard K. Kobe
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pointwise multipliers between Sobolev spaces
, 2005 The objective of this thesis is to give the fundamental tools of the theory of the pointwise multipliers based mainly on the theory of the Fourier transform and of tempered distributions, and to give it applications in the theory of PDE's. The study of the multipliers pointwise examines in what condition we have the capacitary inequality.
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On Cahn–Hilliard Type Viscoelastoplastic Two‐Phase Flows
Proceedings in Applied Mathematics and Mechanics, Volume 26, Issue 2, June 2026.ABSTRACT This contribution deals with a model for viscoelastoplastic two‐phase flows of Cahn–Hilliard type. We present the modeling framework for the flow, the notion of a generalized solution, namely the so‐called dissipative solution, and the key ideas of the existence proof.
Fan Cheng +2 more
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