N Namachchivaya, University of Waterloo

Research

Read how they describe their research on their University of Waterloo profile.

Multi-scale modeling Homogenization Filtering and estimation Stability and bifurcation theory Nonlinear and random dynamical systems

Latest papers

Lyapunov Exponents, Rotation Numbers and Invariant Measures for Scalar Delay Differential Equations with Multiplicative Noise
SSRN Electronic Journal · 2026
POD-Galerkin reduced-order modeling of the El Niño-Southern Oscillation (ENSO)
Applied Ocean Research · 2025 · senior author
POD-Galerkin Reduced Order Modeling of the El Nino-Southern Oscillation (ENSO)
arXiv (Cornell University) · 2025 · senior author

All 199 publications

From the 150 most recent of 199 publications.

01

Lyapunov Exponents, Rotation Numbers and Invariant Measures for Scalar Delay Differential Equations with Multiplicative Noise

Volker Wihstutz, Navaratnam Sri Namachchivaya, Tianlang Luo

SSRN Electronic Journal2026Open Access

DOI: 10.2139/ssrn.6999342

02

POD-Galerkin reduced-order modeling of the El Niño-Southern Oscillation (ENSO)

Yusuf Aydogdu, Navaratnam Sri Namachchivaya

Applied Ocean Research20252 citationsSenior authorOpen Access

DOI: 10.1016/j.apor.2025.104893

03

POD-Galerkin Reduced Order Modeling of the El Nino-Southern Oscillation (ENSO)

Yusuf Aydogdu, Navaratnam Sri Namachchivaya

arXiv (Cornell University)2025Senior authorOpen Access

DOI: 10.48550/arxiv.2503.13614

04

Pod-Galerkin Reduced Order Modeling of the El Niño-Southern Oscillation (Enso)

Yusuf Aydogdu, Navaratnam Sri Namachchivaya

SSRN Electronic Journal2025Senior authorOpen Access

DOI: 10.2139/ssrn.5200108

05

Asymptotic Approximation of the Maximal Lyapunov Exponent of Moore-Greitzer PDE Model with Small Multiplicative Noise Close to Stall Bifurcation

Yiming Meng, Navaratnam Sri Namachchivaya, Nicolas Perkowski

IUTAM bookseries2025

DOI: 10.1007/978-3-031-72794-8_8

06

Almost sure asymptotic stability of parabolic SPDEs with small multiplicative noise: with application to the perturbed Moore-Greitzer model

Yiming Meng, Navaratnam Sri Namachchivaya, Nicolas Perkowski

Dynamical Systems20242 citations

DOI: 10.1080/14689367.2024.2436364

07

Quickest change detection in nonlinear hidden Markov models using a generalized CUSUM procedure with particle filters

Peter H. Baxendale, Dongchang Li, Navaratnam Sri Namachchivaya

Nonlinear Dynamics20241 citationsSenior author

DOI: 10.1007/s11071-024-09995-w

08

Almost-Sure Stability of the Single Mode Solution of a Noisy Nonlinear Autoparametric System

Peter H. Baxendale, Navaratnam Sri Namachchivaya

SIAM Journal on Mathematical Analysis20241 citationsSenior authorOpen Access

DOI: 10.1137/23m1556502

09

A Numerical Study of Stochastic El Niño Southern Oscillations Using Wiener Chaos Expansion and Monte Carlo Methods

Yusuf Aydogdu, Navaratnam Sri Namachchivaya

Tellus A Dynamic Meteorology and Oceanography2024Senior authorOpen Access

DOI: 10.16993/tellusa.4067

10

Hopf Bifurcations of Moore-Greitzer PDE Model with Additive Noise

Yiming Meng, Navaratnam Sri Namachchivaya, Nicolas Perkowski

Journal of Nonlinear Science20237 citationsOpen Access

DOI: 10.1007/s00332-023-09929-7 PMID: 37337607

Frequent collaborators

Department of Applied Mathematics
Department of Mathematics and Statistics

Co-authors at University of Waterloo, colored by department. Thicker lines mean more shared papers; select anyone to open their profile and their own map.

Navaratnam Namachchivaya

Department of Applied Mathematics

199 shared papers, latest 2026

William Langford

Department of Mathematics and Statistics

3 shared papers, latest 2002

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Subject: Prospective PhD student: Multi-scale modeling Dear Professor Namachchivaya, My name is [your name], and I am a [your current degree or role] at [your institution]. I am applying for a PhD position starting in [term and year]. I read your paper "Lyapunov Exponents, Rotation Numbers and Invariant Measures for Scalar Delay Differential Equations with Multiplicative Noise" (2026), and it connects closely to my own work on [your research topic]. [One or two sentences on what you did and what you learned.] Are you accepting new PhD students for [term and year]? I have attached my CV and transcripts, and I would be glad to talk at a time that suits you. Thank you for your time. Kind regards, [your name]