Shreyas Pai (श्रेयस पै)

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I am a postdoc in the Theory group at Aalto University hosted by Prof. Jara Uitto.
I received my PhD in Computer Science at The University of Iowa under the supervision of Prof. Sriram Pemmaraju in Spring 2021.

My research interests generally lie in Theoretical Computer Science, more specifically in Distributed Algorithms, Communication Complexity, and Combinatorial Optimization.

During my PhD, I was a research assistant in the Computational Epidemiology Group where I worked on understanding and modeling the spread of Hospital Acquired Infections (see here for more information).

Here is my CV. My ORCID: 0000-0003-2409-7807. And here are links to my arXiv and dblp pages.


  1. Risk-aware Temporal Cascade Reconstruction to Detect Asymptomatic Cases [paper] [code]
    • Hankyu Jang, Shreyas Pai, Bijaya Adhikari, and Sriram Pemmaraju
    • IEEE ICDM 2021 21st IEEE International Conference on Data Mining
  2. Can we Break Symmetry with \(o(m)\) Communication? [paper] [video]
    • with Gopal Pandurangan, Sriram Pemmaraju, and Peter Robinson
    • PODC 2021
  3. Sample-and-Gather: Fast Ruling Set Algorithms in the Low-Memory MPC Model [paper] [video]
    • with Kishore Kothapalli and Sriram Pemmaraju
    • FSTTCS 2020
  4. Distributed Approximation on Power Graphs [paper] [video]
    • with Reuven Bar-Yehuda, Keren Censor-Hillel, Yannic Maus, and Sriram Pemmaraju
    • PODC 2020
  5. Spatiotemporal clustering of in-hospital Clostridioides difficile infection [paper]
    • Shreyas Pai, Philip Polgreen, Alberto Segre, Daniel Sewell, and Sriram Pemmaraju
    • Infection Control and Hospital Epidemiology 2019
  6. A Constant Approximation for Colorful \(k\)-Center [paper]
    • with Sayan Bandyapadhyay, Tanmay Inamdar, and Kasturi Varadarajan
    • ESA 2019
  7. Connectivity Lower Bounds in Broadcast Congested Clique [paper] [video]
    • with Sriram Pemmaraju
    • PODC 2019 (Brief Announcement) and FSTTCS 2020
  8. Large-Scale Distributed Algorithms for Facility Location with Outliers [paper]
    • with Tanmay Inamdar, and Sriram Pemmaraju
    • OPODIS 2018
  9. Near Optimal Clustering in the \(k\)-machine model [paper]
    • with Sayan Bandyapadhyay, Tanmay Inamdar, and Sriram Pemmaraju
    • ICDCN 2018, TCS 2021
  10. Symmetry Breaking in the Congest Model: Time– and Message–Efficient Algorithms for Ruling Sets [paper]
    • with Gopal Pandurangan, Sriram Pemmaraju, Talal Riaz, and Peter Robinson
    • PODC 2017 (Brief Announcement) and DISC 2017

Note: Publications where my name appears explicitly have author names by order of contribution. In the rest, the ordering is by last name.


  • Fall 2021: TA for CS-E3190 Principles of Algorithmic Techniques
  • Spring 2020: TA for CS:4330 Theory of Computation
  • Spring 2017: Instructor for CS:3330 Algorithms, Section 2
  • Fall 2016: TA for CS:1210 Computer Science 1: Fundamentals


Office: B313, Konemiehentie 2, 02150 Espoo, Finland