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Atishaya Maharjan — home

Research

Research positions, original preprints and working papers, talks, and ongoing investigations.


1.Positions

Mar 2024 – Present

Undergraduate Researcher — Algorithms & Computational Geometry

GADA Lab (Geometric, Approximation & Distributed Algorithms) · University of Manitoba

Supervisors: Dr. Stephane Durocher, Dr. Anurag Murty Naredla, Dr. Leqi (Jimmy) Zhu & Dr. Avery Miller

  • –Co-authoring Geometric Algorithms and Hardness for Fuel-Efficient Collaborative Delivery, which studies how cooperating delivery agents (e.g. drones) can move a package while minimizing total fuel use.
  • –Results include an O(n²) algorithm for the line-restricted setting, improving the previous O(n³) bound from WALCOM 2025, and an O(n³) algorithm for the unrestricted L1 setting.
  • –We prove the Euclidean (L2) setting is NP-hard, and show that the L1 algorithm gives a √2-approximation for it.
  • –Developed an approximation algorithm for Hamiltonian-path optimization in spatially embedded graphs, with visualization and randomized testing across 100+ synthetic instances.
  • –Improved the performance of a noncrossing spanning-tree research library by 30% and introduced stronger Python testing, documentation, and development practices.
  • –Gave reading-group talks at weekly GADA lab meetings (see Talks).

Sep 2026 – Apr 2027

Honours Research Project — Calibrated Risk Prediction

Department of Computer Science · University of Manitoba

Supervisors: Dr. Christopher Henry, Dr. Mohammad Sayari & Dr. Sadaf Salehkalaibar

  • –Building calibrated models that predict potato pathogen risk and yield loss, so that predicted probabilities can be trusted when making decisions under uncertainty.
  • –Interdisciplinary project in collaboration with the Department of Plant Science.

May 2025 – Present

Machine Learning Researcher

Terrabyte Machine Learning Research Group · Winnipeg

  • –Extended diffusion-based learning to higher-order relational data by implementing 4 Hypergraph Neural Diffusion variants in PyTorch and PyTorch Geometric.
  • –Built a reproducible MLflow pipeline tracking configurations, metrics, and evaluations for 25+ experiments across 5+ datasets.

Jan 2024 – Jul 2025

Undergraduate Researcher — Combinatorics & Graph Theory

Manitoba eXperimental Mathematics Laboratory (MXML) · Department of Mathematics, University of Manitoba

Supervisors: Dr. Andrii Arman & Dr. Mahsa N. Shirazi

  • –Established a coefficientwise inequality underlying the Hurlbert–Kamat property for perfect m-ary trees, and derived a closed-form expression for their independence number.
  • –Used generating functions, polynomial recurrences, induction, and coefficientwise analysis to build the argument.
  • –Ran SageMath and Python experiments across 1,000+ instances to test conjectures, verify symbolic identities, and validate intermediate results.

2.Preprints & Working Papers

Not yet peer-reviewed. Author order is alphabetical, as is standard in theoretical computer science.

  1. [1] S. Durocher, A. Maharjan, A. Miller, A. M. Naredla. Geometric Algorithms and Hardness for Fuel-Efficient Collaborative Delivery. Manuscript in preparation. Computational Geometry · Algorithms. An O(n²) algorithm for the line-restricted setting (improving the O(n³) bound of WALCOM 2025), an O(n³) algorithm for the L1 setting, NP-hardness for the Euclidean (L2) setting, and a √2-approximation for L2.
  2. [2] A. Arman, A. Maharjan, M. N. Shirazi. HK Property in Perfect Binary Trees. Preprint. Combinatorics · Graph Theory. A generating-function framework for counting the sizes of stars (independent sets containing a fixed vertex) in perfect m-ary trees. It gives an alternate, coefficientwise proof of the HK-property for perfect m-ary trees, first proved by Iľkovič and Yan with a combinatorial injection. It also measures the gap between the leaf star and the root star through a structured recurrence, and recovers EKR consequences such as formulas for the independence number and the minimum size of a maximal independent set. [PDF]
  3. [3] A. Maharjan. Wiener Index. Report. Graph Theory · Heuristics. Implementation of a heuristic algorithm for an open problem on the Wiener index (the sum of all pairwise distances between vertices of a graph), with an analysis of the problem. Exploratory; it does not resolve the problem. [PDF]

3.Talks & Presentations

Talks marked with an asterisk (*) present papers authored by others, given as reading-group talks.

Jul 28, 2025

Spectral Graph Theory for Maze Solving *

GADA Lab Research Meetings · EITC E2, University of Manitoba

[Slides]

Oct 3, 2025

Wiggly Permutations *

GADA Lab Research Meetings · University of Manitoba

Talk presenting the CCCG 2025 paper by its authors; presented as a reading-group talk.

[Slides]

Feb 4, 2026

Space-Efficient Eulerian Circuits *

GADA Lab Research Meetings · University of Manitoba

Talk presenting the SOSA 2026 paper by its authors; presented as a reading-group talk.

[Slides]

Mar 28, 2024

Exploring Perfect Binary Trees with Relation to the HK-Property

UM Combinatorics Seminar · Machray Hall, University of Manitoba

[Slides]

Sep 18, 2024

Git Fundamentals

Coding Kickoff · EITC E2, University of Manitoba

[Slides]


4.Ongoing Work

Fuel-Efficient Collaborative Delivery. Writing up the manuscript with Dr. Stephane Durocher, Dr. Anurag Murty Naredla & Dr. Avery Miller, and exploring an implementation and benchmark of the line-restricted algorithm.

Calibrated Pathogen-Risk Prediction. Honours project with Dr. Christopher Henry on calibrated prediction of potato pathogen risk and yield loss — learning and decision-making under uncertainty.

Hurlbert–Kamat Property for Trees. Continuing the investigation of the Hurlbert–Kamat property for tree families beyond the perfect binary case.

Hypergraph Neural Networks. Extending diffusion-based GNN architectures to hypergraphs with PyTorch Geometric.