Results 21 to 30 of about 2,268,510 (323)
Scalar Curvature, Entropy, and Generalized Ricci Flow [PDF]
International mathematics research notices, 2022 We derive a family of weighted scalar curvature monotonicity formulas for generalized Ricci flow, involving an auxiliary dilaton field evolving by a certain reaction–diffusion equation motivated by renormalization group flow.
J. Streets
semanticscholar +1 more source
Analysis, Prediction, and Control of Epidemics: A Survey from Scalar to Dynamic Network Models [PDF]
IEEE Circuits and Systems Magazine, 2021 During the ongoing COVID-19 pandemic, mathematical models of epidemic spreading have emerged as powerful tools to produce valuable predictions of the evolution of the pandemic, helping public health authorities decide which intervention policies should ...
Lorenzo Zino, M. Cao
semanticscholar +1 more source
Weak scalar curvature lower bounds along Ricci flow [PDF]
Science China Mathematics, 2021 In this paper, we study Ricci flow on compact manifolds with a continuous initial metric. It was known from Simon (2002) that the Ricci flow exists for a short time.
Wenshuai Jiang +2 more
semanticscholar +1 more source
Decay of scalar curvature on uniformly contractible manifolds with finite asymptotic dimension [PDF]
Communications on Pure and Applied Mathematics, 2021 Gromov proved a quadratic decay inequality of scalar curvature for a class of complete manifolds. In this paper, we prove that for any uniformly contractible manifold with finite asymptotic dimension, its scalar curvature decays to zero at a rate ...
Jinmin Wang, Zhizhang Xie, Guoliang Yu
semanticscholar +1 more source
Validation of scales for measuring factors of teaching quality from the dynamic model of educational effectiveness [PDF]
Psihologija, 2022 Large-scale educational effectiveness research requires valid student questionnaires to assess teaching practices. This research validated eight scales for measuring teaching factors from the Dynamic Model of Educational Effectiveness (DMEE).
Bodroža Bojana +2 more
doaj +1 more source
Pre-service mathematics teachers’ understanding of vector
Jurnal Math Educator Nusantara: Wahana Publikasi Karya Tulis Ilmiah di Bidang Pendidikan Matematika, 2023 Vector is an important concept in mathematics. Pre-service mathematics teachers explore vector concepts in several courses. This concept is also related to various concepts in mathematics.
Kimura Patar Tamba
doaj +1 more source
International Journal of Assessment Tools in Education, 2021 In the current study, the appropriateness of the Mathematics Attitude Questionnaire administered to middle school 8th grade students in the TIMSS 2015 application to the exploratory structural equation and confirmatory factor analysis models was examined.
Şeyma Uyar
doaj +1 more source
Local Mathematics and No Information at a Distance; Some Effects on Physics and Geometry
Proceedings, 2020 Local mathematics consists of a collection of mathematical systems located at each space and time point. The collection is limited to the systems that include numbers in their axiomatic description.
Paul Benioff
doaj +1 more source
Control strategy design of 100 W fast response half bridge LLC resonant converter
Dianzi Jishu Yingyong, 2022 For the dynamic characteristics of communication power supply when there is an inflow of big data traffic, a design of half-bridge LLC resonant converter based on variable universe fuzzy-PID control is proposed, which can realize the fast response ...
Rao Gang +3 more
doaj +1 more source