Results 111 to 120 of about 6,758 (251)
Journal of Time Series Analysis, EarlyView.ABSTRACT The paper deals with the construction of a synthetic indicator of economic growth, obtained by projecting a quarterly measure of aggregate economic activity, namely gross domestic product (GDP), into the space spanned by a finite number of smooth principal components, representative of the medium‐to‐long‐run component of economic growth of a ...
Alessandro Giovannelli +2 more
wiley +1 more source
Detecting Periodicity of a General Stationary Time Series via AR(2)‐Model Fitting
Journal of Time Series Analysis, EarlyView.ABSTRACT Estimating the periodicity of a stationary time series via fitting a second‐order stationary autoregressive (AR(2)) model has been initiated by the seminal paper of Yule (1927). We investigate properties of this procedure when applied to general stationary processes possessing a spectral density with a dominant peak at some unknown frequency ...
Jens‐Peter Kreiss +2 more
wiley +1 more source
Alternating method on arbitrary Riemann surfaces [PDF]
Pacific Journal of Mathematics, 1953 openaire +3 more sources
On the Exact Limiting Distribution of a Volatility Target Index
Mathematical Finance, EarlyView.ABSTRACT Assuming a lognormal distribution for the underlying risky asset, we study the limiting distribution of a volatility target index as the rebalancing time step approaches zero. Two limit theorems (a strong law of large numbers and a central limit theorem) are established, and as an application, the exact limiting distribution is derived.
Xuan Liu, Michel Gauthier
wiley +1 more source
Restoration Ecology, EarlyView.Abstract Introduction Over 44% of European lakes fail to meet ecological quality standards, prompting substantial investment in lake restoration to achieve good ecological status. Unfortunately, effects are often short‐lived due to persistent internal phosphorus (P) loading and strong cyprinid‐driven bottom‐up control, which limits water quality ...
Emma Polauke +3 more
wiley +1 more source
The Finite Element Method on a Riemann Surface
, 1989 Contents / p2 Introduction / p1 Chapter 1. Triangulation / p6 §1.1. Collection Φ of local parameters / p6 §1.2. Triangulation K associated to Φ / p7 §1.3. Normal subdivision of triangulation K / p10 §1.4. Naturalized triangulation / p11 §1.5. Parametrization of lunar domains / p13 §1.6. Area of lune / p14 Chapter 2. Spaces of differentials / p16
openaire +3 more sources
On the conditions of validity of Riemann’s method of integration [PDF]
Quarterly of Applied Mathematics, 1957 openaire +2 more sources
The Long Shadow of Karl Weierstraß Over the Calculus of Variations
Proceedings in Applied Mathematics and Mechanics, Volume 26, Issue 4, December 2026.ABSTRACT At first glance, it appears that the contents of Karl Weierstraß's (1815–1897) lecture courses on the calculus of variations were made available to the public only in the seventh volume of his Mathematische Werke, and thus not until 30 years after his death.
Peter Ullrich
wiley +1 more source
Personality and Mental Health, Volume 20, Issue 4, November 2026.ABSTRACT According to the functional ensemble of temperament (FET) model, individual differences in temperament arise from the balance of neurotransmitter systems also crucial for regulating circadian rhythms and sleep, suggesting a strong neurobiological link between temperament and sleep behavior.
Stefano Lasaponara +6 more
wiley +1 more source
Geoscience Data Journal, Volume 13, Issue 4, October 2026.Physicochemical in situ data of BoB close to the newly declared Naf MPA of Bangladesh. ABSTRACT Physicochemical data acquisition was carried out within the northeastern Bay of Bengal (BoB), adjacent to the newly declared Naf Marine Protected Area (Naf MPA) of Bangladesh.
Mohammad Tanzil Hasan +3 more
wiley +1 more source