The influence of parasitic modes on stable lattice Boltzmann schemes and weakly unstable multi-step Finite Difference schemes

T Bellotti - Computers & Mathematics with Applications, 2024 - Elsevier
Numerical analysis for linear constant-coefficient multi-step Finite Difference schemes is a
longstanding topic, developed approximately fifty years ago. It relies on the stability of the …

Linear stability of discrete shock profiles for systems of conservation laws

L Coeuret - arxiv preprint arxiv:2311.02507, 2023 - arxiv.org
We prove the linear orbital stability of spectrally stable stationary discrete shock profiles for
conservative finite difference schemes applied to systems of conservation laws. The proof …

Local limit theorem for complex valued sequences

L Coeuret - arxiv preprint arxiv:2201.01514, 2022 - arxiv.org
In this article, we study the pointwise asymptotic behavior of iterated convolutions on the one
dimensional lattice Z. We generalize the so-called local limit theorem in probability theory to …

The logarithmic Bramson correction for Fisher-KPP equations on the lattice ℤ

C Besse, G Faye, JM Roquejoffre, M Zhang - Transactions of the American …, 2023 - ams.org
We establish in this paper the logarithmic Bramson correction for Fisher-KPP equations on
the lattice $\mathbb {Z} $. The level sets of solutions with step-like initial conditions are …

The influence of parasitic modes on" weakly''unstable multi-step Finite Difference schemes

T Bellotti - arxiv preprint arxiv:2312.14503, 2023 - arxiv.org
Numerical analysis for linear constant-coefficients Finite Difference schemes was developed
approximately fifty years ago. It relies on the assumption of scheme stability and in particular …

The local limit theorem for complex valued sequences: the parabolic case

JF Coulombel, G Faye - Comptes …, 2024 - comptes-rendus.academie-sciences …
We give a complete expansion, at any accuracy order, for the iterated convolution of a
complex valued integrable sequence in one space dimension. The remainders are …

Mathematical derivation of wave propagation properties in hierarchical neural networks with predictive coding feedback dynamics

G Faye, G Fouilhé, R VanRullen - Bulletin of Mathematical Biology, 2023 - Springer
Sensory perception (eg, vision) relies on a hierarchy of cortical areas, in which neural
activity propagates in both directions, to convey information not only about sensory inputs …

Tamed stability of finite difference schemes for the transport equation on the half-line

L Coeuret - Mathematics of Computation, 2024 - ams.org
In this paper, we prove that, under precise spectral assumptions, some finite difference
approximations of scalar leftgoing transport equations on the positive half-line with …

Local limit theorems for complex functions on Zd

E Randles - Journal of Mathematical Analysis and Applications, 2023 - Elsevier
The local (central) limit theorem precisely describes the behavior of iterated convolution
powers of a probability distribution on the d-dimensional integer lattice, Z d. Under certain …

On-diagonal asymptotics for heat kernels of a class of inhomogeneous partial differential operators

E Randles, L Saloff-Coste - Journal of Differential Equations, 2023 - Elsevier
We consider certain constant-coefficient differential operators on R d that have positive-
definite symbols. Each such operator Λ with symbol P defines a semigroup of operators e− t …