Results 71 to 80 of about 680 (193)

Critically fixed Thurston maps: classification, recognition, and twisting

open access: yesProceedings of the London Mathematical Society, Volume 132, Issue 3, March 2026.
Abstract An orientation‐preserving branched covering map f:S2→S2$f\colon S^2\rightarrow S^2$ is called a critically fixed Thurston map if f$f$ fixes each of its critical points. It was recently shown that there is an explicit one‐to‐one correspondence between Möbius conjugacy classes of critically fixed rational maps and isomorphism classes of planar ...
Mikhail Hlushchanka, Nikolai Prochorov
wiley   +1 more source

Periodic dynamic systems for infected hosts and mosquitoes

open access: yesRevista de Saúde Pública, 1996
A mathematical model for the purpose of analysing the dynamic of the populations of infected hosts anf infected mosquitoes when the populations of mosquitoes are periodic in time is here presented.
Oliva W. M., Sallum E. M.
doaj   +3 more sources

Application of the Filippov Method for the Stability Analysis of a Photovoltaic System

open access: yesAdvances in Electrical and Computer Engineering, 2011
This paper describes bifurcation phenomena of a photovoltaic system. The studied photovoltaic (PV) system includes a solar panel, a boost converter, a maximum power point tracking (MPPT) controller and a storage device.
PETREUS, D., MOREL, C., RUSU, A.
doaj   +1 more source

Nested algebraic Bethe ansatz for orthogonal and symplectic open spin chains

open access: yesNuclear Physics B, 2020
We present a nested algebraic Bethe ansatz for one-dimensional so2n- and sp2n-symmetric open spin chains with diagonal boundary conditions. The monodromy matrix of these spin chains satisfies the defining relations on the extended twisted Yangians Xρ ...
Allan Gerrard, Vidas Regelskis
doaj   +1 more source

Dimer models and conformal structures

open access: yesCommunications on Pure and Applied Mathematics, Volume 79, Issue 2, Page 340-446, February 2026.
Abstract Dimer models have been the focus of intense research efforts over the last years. Our paper grew out of an effort to develop new methods to study minimizers or the asymptotic height functions of general dimer models and the geometry of their frozen boundaries.
Kari Astala   +3 more
wiley   +1 more source

On Monodromy Matrix Computation

open access: yes, 2007
We present a study on the critical time step for the numerical integration based on the Runge-Kutta method of the monodromy matrix (the fundamental matrix solution) associated with a set of n first-order linear ordinary differential equations with ...
Xiaodong Wang, Jack K. Hale
core  

Reverse isoperimetric inequalities for Lagrangian intersection Floer theory

open access: yesBulletin of the London Mathematical Society, Volume 58, Issue 2, February 2026.
Abstract We extend Groman and Solomon's reverse isoperimetric inequality to pseudoholomorphic curves with punctures at the boundary and whose boundary components lie in a collection of Lagrangian submanifolds with intersections locally modelled on Rn∩(Rk×−1Rn−k)$\mathbb {R}^n\cap (\mathbb {R}^{k}\times \sqrt {-1}\mathbb {R}^{n-k})$ inside Cn$\mathbb {C}
J. ‐P. Chassé, J. Hicks, Y. J. Nho
wiley   +1 more source

Stability analysis and control of bifurcations of parallel connected DC/DC converters using the monodromy matrix

open access: yes, 2008
--The paper studies the stability of parallel DC/DC converters using the concept of monodromy matrix (the state transition matrix for one complete cycle), whose eigenvalues are the Floquet multipliers.
Zahawi, B.   +9 more
core   +1 more source

A general order full-discretization algorithm for chatter avoidance in milling

open access: yesAdvances in Mechanical Engineering, 2018
Based on the full-discretization method, this work presents a generalized monodromy matrix as an exact function of the order of polynomial approximation of the milling state for chatter avoidance algorithm.
Chigbogu Godwin Ozoegwu
doaj   +1 more source

Infinite distances in field space and massless towers of states

open access: yesJournal of High Energy Physics, 2018
It has been conjectured that in theories consistent with quantum gravity infinite distances in field space coincide with an infinite tower of states becoming massless exponentially fast in the proper field distance.
Thomas W. Grimm   +2 more
doaj   +1 more source

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