🔢 mathematics

Complexity Reveals the Microscopic Origins of Macroscopic Dynamics

This paper demonstrates that spectral localization in complex networks fundamentally shifts the understanding of macroscopic dynamics from global eigenmodes to the local behavior of dominant nodes, thereby enabling a node-resolved framework that identifies microscopic drivers and predicts transitions in heterogeneous systems where classical stability theories fail.

Malbor Asllani, Haoyang Qian, Gabriel Hood, Beata Casiday2026-07-10
🔢 mathematics

Discriminant-Guided Preprocessing for Local Solution Algorithms of Second-Order Euler Operators

This paper introduces a discriminant-guided preprocessing method implemented in Macaulay2 that accelerates the computation of local solutions for second-order Euler-type differential operators near x = 0 by detecting complex conjugate indicial roots to construct an oscillatory basis, thereby reducing symbolic branch-management overhead and execution time without impacting non-oscillatory cases.

Enangnon Fiacre LOKOSSOU2026-07-07
🔢 mathematics

Threshold Dynamics of a Spatially Heterogeneous SVEIAR-B Reaction-Diffusion Model under Media Intervention *

This paper establishes the global well-posedness and threshold dynamics of a spatially heterogeneous SVEIAR-B reaction-diffusion epidemic model incorporating media intervention, demonstrating that disease extinction or persistence is determined by the basic reproduction number R0R_0 while highlighting the critical roles of media intensity, vaccination, and spatial heterogeneity in shaping epidemic outcomes.

Lixia Shi, Weimin Hu, Youhui Su, Qian Wen2026-07-06
🔢 mathematics

A Variable-Step IMEX-BDF2 Finite Element Method for the Navier–Stokes Equations: Optimal L2L^2 Error Estimates for Velocity and Pressure

This paper establishes fully optimal L2L^2 error estimates for both velocity and pressure in a variable-step IMEX-BDF2 finite element method for the Navier–Stokes equations by leveraging discrete orthogonal convolution kernels and negative-norm arguments to address time-step variations.

Hongfei Fu, Baolin Kuang, Rihui Lan, Shusen Xie2026-07-03
🔢 mathematics

A Facultative Mutualism Model with Internal Competition for Interactions between University and Technical-Vocational Qualification Frameworks in Tanzania

This study employs a facultative mutualism model based on nonlinear differential equations to demonstrate that balancing articulation mechanisms with institutional competition is essential for achieving a stable, sustainable, and mutually beneficial interaction between Tanzania's University and Technical-Vocational Qualification Frameworks.

Justine KIra2026-07-02