Results 181 to 190 of about 205,279 (307)

Mixed orthogonality graphs for continuous‐time state space models and orthogonal projections

Journal of Time Series Analysis, EarlyView.
In this article, we derive (local) orthogonality graphs for the popular continuous‐time state space models, including in particular multivariate continuous‐time ARMA (MCARMA) processes. In these (local) orthogonality graphs, vertices represent the components of the process, directed edges between the vertices indicate causal influences and undirected ...
Vicky Fasen‐Hartmann, Lea Schenk
wiley   +1 more source

Hopf Galois extensions, triangular structures, and Frobenius Lie algebras in prime characteristic

, 2004
Serge Skryabin
openalex   +2 more sources

Pulse width modulation for current source inverters with arbitrary number of phases. [PDF]

Sci Rep
Pejović P, Ohno T, Borović U, Mirić S.   +3 more
europepmc   +1 more source

Linear Response Equations Revisited: A Simple and Efficient Iterative Algorithm. [PDF]

J Chem Theory Comput, 2023
Alessandro R, Giannì I, Pes F, Nottoli T, Lipparini F.   +4 more
europepmc   +1 more source

On the Classification of Finite-Dimensional Triangular Hopf Algebras

, 2000
Sholmo Gelaki
openalex   +2 more sources

A note on Johansen's rank conditions and the Jordan form of a matrix

Journal of Time Series Analysis, EarlyView.
This note presents insights on the Jordan structure of a matrix which are derived from an extension of the I(1) and I(2) conditions in Johansen (1996). It is first observed that these conditions not only characterize, as it is well known, the size (1 or 2) of the largest Jordan block in the Jordan form of the companion matrix but more generally the ...
Massimo Franchi
wiley   +1 more source

Symplectic Geometry of Teichmüller Spaces for Surfaces with Ideal Boundary. [PDF]

Commun Math Phys
Alekseev A, Meinrenken E.
europepmc   +1 more source

Large-scale distributed linear algebra with tensor processing units. [PDF]

Proc Natl Acad Sci U S A, 2022
Lewis AGM, Beall J, Ganahl M, Hauru M, Mallick SB, Vidal G.   +5 more
europepmc   +1 more source

Weak amenability of triangular Banach algebras

, 2001
Brian Forrest, Laurent W. Marcoux
openalex   +1 more source

Empirical likelihood for martingale differences

Journal of Time Series Analysis, EarlyView.
In this article, we consider an empirical likelihood with vector observations that are martingale differences and prove a Wilks' type theorem under a conditional Lindeberg condition. We then generalize this result to approximate martingale differences.
Anton Schick
wiley   +1 more source