Mahishanka Withanachchi
Postdoctoral Fellow in Mathematics
University of Calgary, Alberta, Canada
Email: mahishanka.withanach@ucalgary.ca
Phone: +1 403 399 3192
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Research Interests
- Complex Analysis and Operator Theory
- Harmonic and Microlocal Analysis
- Geometric Analysis on Kähler Manifolds
- Manifold Learning and Machine Learning Theory
- Mathematical Physics and Spectral Theory
Education
- Ph.D. in Mathematics, Laval University, Canada (2024)
Advisor: Prof. Javad Mashreghi
Dissertation: Polynomial Approximation in Local Dirichlet Spaces
- M.Sc. in Mathematics, Texas A&M University, USA (2018)
- B.Sc. (Honours) in Mathematics, University of Colombo, Sri Lanka (2013)
Preprints & Submitted Papers
- Curvature-Aware Manifold Clustering:
Robust Graph Reweighting via Forman–Ricci Flow,
with Mina Aminghafari, 2026
- Operator-Valued Kernel Regularization of Koopman
Transport and Conservative Scattered Approximations,
2026
Teaching Experience
- MAT 265, Fall 2026 – Calculus I – University of Calgary
- MAT 211, Fall 2026 – Linear Algebra (Active Learning) – University of Calgary
- MAT 275, Fall 2025 – Engineering Calculus (Active Learning) – University of Calgary
- MAT 267, Winter 2025 – Calculus II – University of Calgary
- MAT 249, Autumn 2024 – Introductory Calculus I – University of Calgary
- MAT 1200, Autumn 2021 – Spring 2022 – Linear Algebra – Laval University (in French)
- MAT 1910, Winter 2019 – Spring 2021 – Engineering Mathematics – Laval University (in French)
- Math 142, Summer 2018 – Business Calculus – Texas A&M University
- Math 152, Spring 2018 – Engineering Mathematics II – Texas A&M University
- Math 253, Fall 2017 – Engineering Mathematics III – Texas A&M University
- Math 663, Summer 2017 – Algebra Qualifier Prep – Texas A&M University
- Math 152, Spring 2017 – Engineering Mathematics I – Texas A&M University
- Math 151, Fall 2016 – Engineering Mathematics I – Texas A&M University
- Math 304, Spring 2016 – Linear Algebra – Texas A&M University
- Math 152, Fall 2015 – Engineering Mathematics II – Texas A&M University
- Math 152, Spring 2014 – Engineering Mathematics I – Texas A&M University
- Math 151, Summer 2014 – Engineering Mathematics I – Texas A&M University
- Math 172, Fall 2013 – Calculus II – Texas A&M University
- Math 171, Spring 2013 – Calculus I – Texas A&M University
Fellowships and Awards
- University of Calgary Postdoctoral Fellowship (Canada)
- ISM Graduate Scholarship (Laval University)
- Multiple NSF and SIAM Travel Awards (Texas A&M)
- Dean’s Scholarship (Texas A&M)
- Dr. Douglas Amarasekara Award for Best Math Graduate (University of Colombo)
- Laval University Excellence Scholarship for New Graduate Students
Invited Talks & Conference Roles
- Organizer – JMM Special Session in Mathematical Approaches in the Astrophysics Realm, Chicago, 2027
- Invited Speaker – IWOTA, International Workshop on Operator Theory and its Applications, 2026
- Invited Speaker – Analysis Seminar, Kyoto University, Japan, 2025
- Co-Organizer – CMS Winter Meeting (Toronto, 2025): Session on Complex Analysis and Geometry
- Visiting Scholar – Deakin University June 2025 (Worked with Dr. Lashi Bandara)
- Invited Speaker – University of Sydney PDE Seminar (2025)
- Invited Speaker – Monash University (Analysis, PDE & Geometry Seminar)
- Organizer – University of Calgary AGMP Seminar (2025)
- Co-Organizer – SSC Meeting (2025): Session on Data Science and Machine Learning
- Speaker – CMS Summer Meeting, Saskatoon (2024)
- Speaker – JMM Special Session on Harmonic Analysis and Fractals (2024)
- Speaker – CIRM (France), Operators on Analytic Function Spaces (2024)
Programming & Technical Skills
- Languages: Python, MATLAB (10+ years), C++, Java
- Experienced with LaTeX, numerical simulations, and algorithm design
- Problem solving using Project Euler and custom algorithmic work