Results 81 to 90 of about 977 (189)

Markup Centrality and International Incidence in Global Production Networks

Review of International Economics, EarlyView.
ABSTRACT This paper develops a framework to measure how markups amplify prices through global production networks and to attribute final‐demand price wedges to upstream country‐industry sources. The approach defines a compound markup as the ratio of observed prices to counterfactual pure‐cost prices that would prevail if all markups in the network were
Constantin Colonescu
wiley   +1 more source

Navigating the Path to Mathematics Success: Exploring Academic Performance and Exclusionary School Discipline Among Black Students

School Science and Mathematics, EarlyView.
ABSTRACT This study examines the predictive relationships among early mathematics and reading achievement, school discipline, and later mathematics performance for Black students. Using path analysis, we analyze a cohort of 36,668 Black students in Texas public schools from fourth to seventh grade.
Micayla Gooden, Virginia Redwine Johnson, Aminah Crawford, John A. Williams III   +3 more
wiley   +1 more source

Rational points on even‐dimensional Fermat cubics

Transactions of the London Mathematical Society, Volume 13, Issue 1, December 2026.
Abstract We show that even‐dimensional Fermat cubic hypersurfaces are rational over any field of characteristic not equal to three, by constructing explicit rational parameterizations with polynomials of low degree. As a byproduct of our rationality constructions, we obtain estimates for the number of their rational points over a number field and ...
Alex Massarenti
wiley   +1 more source

KOORDINACE SILNĚ ZÁVISLÝCH KŘIŽOVATEK V MAX-PLUS ALGEBŘE

Perner’s Contacts, 2011
Příspěvek se zabývá navrhováním koordinace světelného řízení silně závislých křižovatek prostřednictvím Max-plus algebry. V první části je uvedeno definování problému a proveden teoretický rozbor Max-plus algebry.
Michal Turek
doaj  

ANALYSIS OF THREE SERVERS CLOSED SERIES QUEUING NETWORK WITH DELAY TIME USING MAX-PLUS ALGEBRA

Barekeng
Max-Plus Algebra, which is the union of the set of all real numbers with an infinite singleton, equipped with maximum (max) and plus (+) operations, can be used to model and analyze algebraically the dynamics of a closed queuing network.
Marcellinus Andy Rudhito, Dewa Putu Wiadnyana Putra   +1 more
doaj   +1 more source

Control Problem in Max Plus Linear Model with Temporal Constraints

Revista Iberoamericana de Automática e Informática Industrial RIAI, 2016
This article deals with the control of discrete event systems subject to synchronization and delay phenomena, described by a plus max linear model. The temporal constraints are imposed on the state space of the system.
C. Cárdenas, J. Cardillo, J.J. Loiseau, C. Martínez   +3 more
doaj   +1 more source

Invariant Measure and Universality of the 2D Yang–Mills Langevin Dynamic

Communications on Pure and Applied Mathematics, Volume 79, Issue 8, Page 1973-2102, August 2026.
ABSTRACT We prove that the Yang–Mills (YM) measure for the trivial principal bundle over the two‐dimensional torus, with any connected, compact structure group, is invariant for the associated renormalised Langevin dynamic. Our argument relies on a combination of regularity structures, lattice gauge‐fixing and Bourgain's method for invariant measures ...
Ilya Chevyrev, Hao Shen
wiley   +1 more source

SYNCHRONIZACE ODJEZDŮ SPOJŮ Z PŘESTUPNÍCH ZASTÁVEK MHD V MAX-PLUS ALGEBŘE

Perner’s Contacts, 2011
Příspěvek se zabývá modelováním synchronizace odjezdů spojů z přestupních zastávek pomocí Max-plus algebry. V úvodu je uveden význam problému přestupu cestujících a motivace využití matematického aparátu Max-plus algebry.
Richard Turek
doaj  

Modelling of continuous low‐temperature emulsion co‐polymerization in 3D‐printed reactor

The Canadian Journal of Chemical Engineering, Volume 104, Issue 7, Page 3692-3713, July 2026.
A kinetic model for the emulsion copolymerization of butyl acrylate/styrene at low temperatures is proposed and validated against experiments with a redox initiator system. The model was successfully transferred to a 3D‐printed tubular reactor and conversions of more than 80% and small particles sizes below 40 nm were observed.
Ferel Issa, Andreas Reinbeck, Kristina M. Zentel   +2 more
wiley   +1 more source

MODELOVÁNÍ SYNCHRONIZACE LINEK MHD V PŘESTUPNÍM UZLU

Perner’s Contacts, 2012
Příspěvek se zabývá modelováním synchronizace odjezdů spojů z přestupních zastávek pomocí max-plus algebry. Problém přestupu cestujících je formulován pomocí matematického aparátu max-plus algebry.
Richard Turek
doaj