Results 181 to 190 of about 20,082 (312)
Some Inequalities in Inner Product Spaces Related to the Generalized Triangle Inequality
, 2009 In this paper we obtain some inequalities related to the generalized triangle and quadratic triangle inequalities for vectors in inner product spaces.
Dragomir, Sever S +2 more
core
Journal of Time Series Analysis, EarlyView.ABSTRACT Expectile is a coherent and elicitable law‐invariant risk measure widely applied in risk management. Existing methods based on iteratively reweighted least squares (IWLS) are not computationally efficient for large‐scale sample sizes. To overcome the issue, we develop a direct nonparametric conditional expectile function estimator by inverting
Feipeng Zhang, Ping‐Shou Zhong
wiley +1 more source
Some means inequalities for positive operators in Hilbert spaces. [PDF]
J Inequal Appl, 2017 Liang J, Shi G.
europepmc +1 more source
ON A HILBERT SPACE WITH NONASSOCIATIVE SCALARS [PDF]
Proceedings of the National Academy of Sciences, 1962 Goldstine, H. H., Horwitz, L. P.
openaire +3 more sources
New Inequalities of the Kantorovich Type for Bounded Linear Operators in Hilbert Spaces
, 2006 Some new inequalities of the Kantorovich type are established. They hold for larger classes of operators and subsets of complex numbers than considered before in the literature and provide refinements of the classical results in the case when the ...
Dragomir, Sever S
core
Density‐Valued ARMA Models by Spline Mixtures
Journal of Time Series Analysis, EarlyView.ABSTRACT This paper proposes a novel framework for modeling time series of probability density functions by extending autoregressive moving average (ARMA) models to density‐valued data. The method is based on a transformation approach, wherein each density function on a compact domain [0,1]d$$ {\left[0,1\right]}^d $$ is approximated by a B‐spline ...
Yasumasa Matsuda, Rei Iwafuchi
wiley +1 more source
New generalized systems of nonlinear ordered variational inclusions involving ⊕ operator in real ordered Hilbert spaces. [PDF]
J Inequal Appl, 2018 Sarfaraz M, Nisar KS, Morsy A, Ahmad MK.
europepmc +1 more source
Topological complexity of manifolds of preferences
The problem of endowing preferences with manifold structures emerged from discussions with Gerard Debreu in 1975 . Time has shown that such structures can be useful in understanding the behavior of economic systems .
Chichilnisky, Graciela
core
A Note on Local Polynomial Regression for Time Series in Banach Spaces
Journal of Time Series Analysis, EarlyView.ABSTRACT This work extends local polynomial regression to Banach space‐valued time series for estimating smoothly varying means and their derivatives in non‐stationary data. The asymptotic properties of both the standard and bias‐reduced Jackknife estimators are analyzed under mild moment conditions, establishing their convergence rates.
Florian Heinrichs
wiley +1 more source