Results 141 to 150 of about 162,209 (248)

Recursive functions defined by ordinal recursions [PDF]

open access: yesProceedings of the American Mathematical Society, 1969
Fabian, R. J., Kent, C. F.
openaire   +1 more source

Moving Sum Procedure for Multiple Change Point Detection in Large Factor Models

open access: yesJournal of Time Series Analysis, Volume 47, Issue 3, Page 450-464, May 2026.
ABSTRACT This paper proposes a moving sum methodology for detecting multiple change points in high‐dimensional time series under a factor model, where changes are attributed to those in loadings as well as emergence or disappearance of factors. We establish the asymptotic null distribution of the proposed test for family‐wise error control and show the
Matteo Barigozzi   +2 more
wiley   +1 more source

Any Topological Recursion on a Rational Spectral Curve is KP Integrable. [PDF]

open access: yesCommun Math Phys
Alexandrov A   +4 more
europepmc   +1 more source

Entrywise transforms preserving matrix positivity and nonpositivity

open access: yesJournal of the London Mathematical Society, Volume 113, Issue 5, May 2026.
Abstract We characterize real and complex functions which, when applied entrywise to square matrices, yield a positive definite matrix if and only if the original matrix is positive definite. We refer to these transformations as sign preservers. Compared to the classical work on entrywise preservers by Schoenberg and others, we completely resolve this ...
Dominique Guillot   +3 more
wiley   +1 more source

New Machine Learning Models for Predicting the Organic Cation Transporters OCT1, OCT2, and OCT3 Uptake

open access: yesACS Omega
Giovanni Bocci   +7 more
doaj   +1 more source

Improved deformation reconstruction of composite material structures based on optical fiber sensing. [PDF]

open access: yesSci Rep
Huang J   +8 more
europepmc   +1 more source

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