Results 211 to 220 of about 249,936 (334)

Impact of Geography on Institutions in Agricultural and Nomadic Societies

International Studies of Economics, EarlyView.
ABSTRACT How geography affects the choice of institutions is studied in a theoretical model. In this model, nations are located around a circle. Rulers compete through choosing tax rates, the level of military spending, and the degree of formality of institutions. Geographic condition is captured by population density.
Haiwen Zhou
wiley   +1 more source

Multiharmonic Algorithms for Contrast-Enhanced Ultrasound. [PDF]

J Sci Comput
Nikolić V, Rauscher T.
europepmc   +1 more source

Uniqueness of positive solutions for a fractional differential equation via a fixed point theorem of a sum operator

, 2012
Chen Yang, Chengbo Zhaı
openalex   +1 more source

The Signed Binary Continued‑Fraction Tree: A Constructive Uniqueness Theorem

Tatsuya Nakano
openalex   +1 more source

A uniqueness theorem for the Nica-Toeplitz algebra of a compactly\n aligned product system [PDF]

, 2017
James Fletcher
openalex   +1 more source

Robust Tests of Forecast Accuracy for Factor‐Augmented Regressions With an Application to the Novel EA‐MD‐QD Dataset

Journal of Applied Econometrics, EarlyView.
ABSTRACT We present four novel tests of equal predictive accuracy and encompassing á Pitarakis (2023, 2025) for factor‐augmented regressions. Factors are estimated using cross‐section averages (CAs) of grouped series and our theoretical findings are empirically relevant: asymptotic normality, robustness to an overspecification of the number of factors,
Alessandro Morico, Ovidijus Stauskas
wiley   +1 more source

Existence and stability of time-fractional Keller-Segel-Navier-Stokes system with Poisson jumps. [PDF]

Sci Rep
Divyabala K, Durga N.
europepmc   +1 more source

Intersection Numbers of the Natural Embedding of the Twisted Triality Hexagon T ( q 3 , q ) ${\mathsf{T}}({q}^{3},q)$ in PG ( 7 , q 3 ) ${\mathsf{PG}}(7,{q}^{3})$

Journal of Combinatorial Designs, EarlyView.
ABSTRACT In this paper, we study and characterise the natural embedding of the twisted triality hexagon T ( q 3 , q ) ${\mathsf{T}}({q}^{3},q)$ in PG ( 7 , q 3 ) ${\mathsf{PG}}(7,{q}^{3})$. We begin by describing the possible intersections of subspaces of PG ( 7 , q 3 ) ${\mathsf{PG}}(7,{q}^{3})$ with T ( q 3 , q ) ${\mathsf{T}}({q}^{3},q)$.
Sebastian Petit, Geertrui Van de Voorde
wiley   +1 more source

Higher-order regularity for a structurally damped plate equation on rough domains. [PDF]

Math Ann
Denk R, Roodenburg FB.
europepmc   +1 more source

Transforming Solutions for the Oberwolfach Problem into Solutions for the Spouse‐Loving Variant

Journal of Combinatorial Designs, EarlyView.
ABSTRACT The Oberwolfach problem OP ( F ) $\mathrm{OP}(F)$, for a 2‐factor F $F$ of K n ${K}_{n}$, asks whether there exists a 2‐factorization of K n ${K}_{n}$ (if n $n$ is odd) or K n − I ${K}_{n}-I$ (if n $n$ is even) where each 2‐factor is isomorphic to F $F$. Here, I $I$ denotes any 1‐factor of K n ${K}_{n}$. For even n $n$, the problem OP( F ) $(F)
Maruša Lekše, Mateja Šajna
wiley   +1 more source