Results 31 to 40 of about 16,273 (125)
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
Optimal Portfolio Choice With Cross‐Impact Propagators
Mathematical Finance, EarlyView.ABSTRACT We consider a class of optimal portfolio choice problems in continuous time where the agent's transactions create both transient cross‐impact driven by a matrix‐valued Volterra propagator, as well as temporary price impact. We formulate this problem as the maximization of a revenue‐risk functional, where the agent also exploits available ...
Eduardo Abi Jaber +2 more
wiley +1 more source
Autoethnography as a Research Methodology in TESOL
TESOL Quarterly, Volume 60, Issue 2, Page 867-886, June 2026.Abstract In this article, I discuss autoethnography as a qualitative research methodology that has been increasingly adopted by scholars in TESOL in the last decade. My goal is to introduce this methodology to colleagues who are preparing to use autoethnography in their research and I expect that introduction to take them to other resources in the ...
Bedrettin Yazan
wiley +1 more source
European Journal of Education, Volume 61, Issue 2, June 2026.ABSTRACT This study explores how international and interdisciplinary research collaboration is experienced and sustained in practice, with particular attention to the roles of early‐career researchers (ECRs). Drawing on a collaborative autoethnographic approach, we analyse four collaboratively constructed narrative vignettes from a three‐year UK–China ...
Yonghua (Yoka) Wang +3 more
wiley +1 more source
Multi-frequency Calderon-Zygmund analysis and connexion to Bochner-Riesz multipliers [PDF]
, 2013 In this work, we describe several results exhibited during a talk at the El Escorial 2012 conference. We aim to pursue the development of a multi-frequency Calderon-Zygmund analysis introduced in [9].
Bernicot, Frederic
core +2 more sources
Degree theory for 4‐dimensional asymptotically conical gradient expanding solitons
Communications on Pure and Applied Mathematics, Volume 79, Issue 5, Page 1151-1298, May 2026.Abstract We develop a new degree theory for 4‐dimensional, asymptotically conical gradient expanding solitons. Our theory implies the existence of gradient expanding solitons that are asymptotic to any given cone over S3$S^3$ with non‐negative scalar curvature. We also obtain a similar existence result for cones whose link is diffeomorphic to S3/Γ$S^3/\
Richard H. Bamler, Eric Chen
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Littlewood, Paley and almost‐orthogonality: a theory well ahead of its time
Journal of the London Mathematical Society, Volume 113, Issue 5, May 2026.Abstract The classic paper by Littlewood and Paley [J. Lond. Math. Soc. (1), 6 (1931), 230–233] marked the birth of Littlewood–Paley theory. We discuss this paper and its impact from a historical perspective, include an outline of the results in the paper and their subsequent significance in relation to developments over the last century, and set them ...
Anthony Carbery
wiley +1 more source
On Gauge‐Invariant Entire Function Regulators and UV Finiteness in Non Local Quantum Field Theory
Annalen der Physik, Volume 538, Issue 4, April 2026.We regulate the theory with an entire function of the covariant operator F(□/M∗2)$F(\square /M^{2}_{*})$. In the perturbative vacuum this becomes a momentum‐space factor F(−p2/M∗2)$F(-p^{2}/M^{2}_{*})$ that exponentially damps high momenta, most transparent after Wick rotation, rendering loop integrals UV finite.
J. W. Moffat, E. J. Thompson
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Mathematische Nachrichten, Volume 299, Issue 4, Page 704-763, April 2026.Abstract This paper is devoted to the approximation of two‐ and three‐dimensional Dirac operators HV∼δΣ$H_{\widetilde{V} \delta _\Sigma }$ with combinations of electrostatic and Lorentz scalar δ$\delta$‐shell interactions in the norm resolvent sense. Relying on results from Behrndt, Holzmann, and Stelzer‐Landauer [Math. Nachr.
Jussi Behrndt +2 more
wiley +1 more source
British Journal of Management, Volume 37, Issue 2, April 2026.Abstract This paper focuses on pluralistic research designs in management and organization studies. While advocates often present such approaches as a means of reconciling practical relevance with scientific rigour, their philosophical coherence remains underexplored, particularly in relation to the paradigm debates of the 1980s and 1990s. Our analysis
Nicholas Black
wiley +1 more source