School of Informatics  ·  University of Edinburgh

Sahel Torkamani

Sahel Torkamani
About

Who am I?

I am a Ph.D. student in Computer Science at the University of Edinburgh, advised by Professor Rik Sarkar. My research focuses on Differential Privacy and Theoretical Machine Learning.

I completed my B.Sc. in Applied Mathematics at Sharif University of Technology, working with Professor Javad Ebrahimi on Differential Privacy and Information Theory. I also interned at IST Austria with Professor Marco Mondelli on Channel Coding and Machine Learning.

Research Interests

Machine Learning Theory Differential Privacy
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Work

Research Projects

Hover over a project to read more.

Generalization in Neural Networks Through the Lens of Magnitude Potential

Under Review · 2026

The magnitude potential ratio, computed at the logit layer, correlates with Feldman memorization scores, detects decision boundary shifts, and provides a geometric indicator of grokking.

Magnitude Distance: A Geometric Measure of Dataset Similarity

Accepted · ICML 2026

A novel distance metric on finite datasets based on the magnitude of a metric space, with a tunable scale parameter and strong theoretical guarantees.

Privacy Requires Slicing: Differentially Private Magnitude via Projections

EuroTDP 2026

Sliced magnitude (SMag), with global sensitivity bounded uniformly in scale and dimension, enabling ε-differentially private release via the Laplace mechanism.

Background

Education & Skills

Education

Ph.D of Informatics

2024 – 2028 · University of Edinburgh


B.Sc in Applied Mathematics

2019 – 2023 · Sharif University of Technology


Diploma in Physics and Mathematics

2013 – 2019 · NODET

Programming Skills

Python
PyTorch
NumPy / SciPy
Matlab
Java
R

Languages

Persian
English
Italian
French

Selected Honors

  • 2024Informatics Graduate School Scholarship, University of Edinburgh
  • 2024Best Speaker, Undergraduate Research Seminars, Sharif University
  • 2019Scholarship, National Elites Foundation
  • 2018National Silver Medal, Iranian Mathematics Olympiad
  • 2017Gold & International Gold, Iranian Geometry Olympiad
Updates

Latest News

Privacy Requires Slicing: Differentially Private Magnitude via Projections

September 2026

Paper accepted at the 1st European Workshop on the Theory of Differential Privacy (EuroTDP 2026), ISTA, Austria.

Event page
London Hopper Colloquium 2026

May 2026

Selected as a finalist in the Research Spotlight Competition at the London Hopper Colloquium 2026, hosted by UCL & BCS Academy of Computing.

Event page
Magnitude Distance: A Geometric Measure of Dataset Similarity

May 2026

Paper accepted at ICML 2026.

ICML
EurIPS 2025

December 2025

Attending the Workshop on Principles of Generative Modeling (PriGM) @ EurIPS2025.

OpenReview
Count on Your Elders: Laplace vs Gaussian Noise

January 2025

Paper accepted at FORC 2025.

arXiv
Improved Counting under Continual Observation

August 2024

Paper accepted at TPDP 2024.

arXiv
Optimal Differential Privacy via Graphs

October 2023

Paper accepted at JSAIT 2023.

arXiv
Heterogeneous Differential Privacy via Graphs

April 2022

Paper accepted at IEEE ISIT'22.

arXiv
Life

Beyond Research

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