Artificial Intelligence
Data Science
Algorithms
archimedes-Artificial Intelligence, Data Science, Algorithms-greece
greece
Algorithms
Data Science
Artificial Intelligence
20th Athens Colloquium on Algorithms and Complexity
Date
2025-08-25
Venue
NTUA, Zografou campus, Athens, Greece
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The Athens Colloquium on Algorithms and Complexity (ACAC) is an annual meeting in Athens aiming to bring together researchers working in all areas of the theory of algorithms and computational complexity. It serves as a lively forum for presenting research results that are in a preliminary stage or have been recently accepted / presented in some major conference. Contributions may appear, fully or partially, in informal electronic proceedings available only to the participants (subject to authors' approval). The language of the workshop is English.
Program
Duration: 2 days - August 25-26, 2025
Progam link: https://www.corelab.ntua.gr/acac25/#program
Place: National Technical University of Athens (NTUA) premises, Multimedia Amphitheater, Central Library Ground Floor, Zografou campus, Athens, Greece
Keynote Talks
- Christina Fragouli, UCLA, US
- Aggelos Kiayias, University of Edinburgh, UK, and IOG, Singapore
- Christos Papadimitriou, Columbia University, US and Archimedes, Athena Research Center, Greece
- Vijay Vazirani, UC Ivrine, US
Contributed Talks
- Georgios Boulougouris
- Loukas Georgiadis
- Spyros Dragazis
- Stelios Drakontaeidis
- Sotiris Kanellopoulos
- Maria Kokkou
- Nikos Lazaropoulos
- Alviona Mancho
- Nicolaos Matsakis
- Panayotis Mertikopoulos
- Nicos Protopapas
- Ioannis Psarros
- Alkmini Sgouritsa
- Stratis Skoulakis
- Panagiotis Tsamopoulos
- Giorgos Tsimos
- Christos Tsoufis
- Manolis Vasilakis
Registration
There are no registration fees.
However, participants should register for administrative purposes, by filling the registration form no later than August 20, Wednesday.
Venue
The 20th Athens Colloquium on Algorithms and Complexity (ACAC) will take place at the Multimedia Amphitheater, Central Library Ground Floor, Zografos campus of the National Technical University of Athens (NTUA), Greece.
You can arrive at the Central Library by various ways:
By public transport:
The easiest way is by taking the Blue Metro line (map) and getting off at the "ΚΑΤΕΧΑΚΗ" station. Then take the bus 242, get off at stop "ΘΥΡΩΡΕΙΟ" (you get off at the first stop inside the Campus) and walk 3 minutes towards the Central Library.
Another option is to take the bus 140 from the "ΚΑΤΕΧΑΚΗ" metro station and get off at stop "ΠΟΛΥΤΕΧΝΕΙΟΥΠΟΛΗ". Then get into the campus and walk 7 minutes towards the Central Library.
By taxi:
Taxi from the Katechaki ("ΚΑΤΕΧΑΚΗ") Station to NTUA will cost aproximately 7-10 €.
By car (or any other means):
Please use this google map to get directions to the conference venue.
Organizers
Organizing & Scientific Committee
- Dimitris Fotakis
- Nikos Leonardos
- Evangelos Markakis
- Aris Pagourtzis
- Alkmini Sgouritsa
- Stathis Zachos
- Vassilis Zissimopoulos
Organization
- Dimitris Lazarou
- Giannis Pavlovic
- Ioanna Protekdikou
Local Arrnagements
- Antonis Antonopoulos
- Pourandokht Behrouz
- Sotiris Kanellopoulos
- Christos Pergaminelis
- Thanos Tolias
Co-Organizers
Archimedes, Athena Research Center, Greece
School of Electrical & Computer Engineering of the National Technical University of Athens (NTUA), Greece
Institute of Communication and Computer Systems of the National Technical University of Athens.
For any further details please contact the organizers by email to This email address is being protected from spambots. You need JavaScript enabled to view it. .
Vision
To position Greece as a leading player in AI and Data Science
Mission
To build an AI Excellence Hub in Greece where the international research community can connect, groundbreaking ideas can thrive, and the next generation of scientists emerges, shaping a brighter future for Greece and the world
Welcome to ARCHIMEDES, a vibrant research hub connecting the global AI and Data Science research community fostering groundbreaking research in Greece and beyond. Its dedicated core team, comprising lead researchers, affiliated researchers, Post-Docs, PhDs and interns, is committed to advancing basic and applied research in Artificial Intelligence and its supporting disciplines, including Algorithms, Statistics, Learning Theory, and Game Theory organized around 8 core research areas. By collaborating with Greek and Foreign Universities and Research Institutes, ARCHIMEDES disseminates its research findings fostering knowledge exchange and providing enriching opportunities for students. Leveraging AI to address real-world challenges, ARCHIMEDES promotes innovation within the Greek ecosystem and extends its societal impact. Established in January 2022, as a research unit of the Athena Research Center with support from the Committee Greece 2021, ARCHIMEDES is funded for its first four years by the EU Recovery and Resilience Facility (RRF).
Christos Papadimitriou Speaks on “Artificial Intelligence: its History, its Present, and its Uncertain Future”
24 March 2026
Christos Papadimitriou, Donovan Family Professor of Computer Science at Columbia Engineering at Columbia University, USA, and Principal Scientist at the Archimedes Research Unit of the Athena Research Center, Greece, spoke about “Artificial Intelligence: its History, its Present, and its Uncertain Future” during the ten-year anniversary event of diaNEOsis think tank, which took place on March 11, 2026, at the Stavros Niarchos Foundation Cultural Center (SNFCC).
Vasia Papanikou to Present the MIMOSA Fairness Exploration Tool at EDBT/ICDT 2026 Joint Conference
24 March 2026
Vasia Papanikou, a PhD student at the University of Ioannina and an Academic fellow at Archimedes, Athena Research Center, Greece, will be demonstrating "MIMOSA: A Tool for Fairness Exploration Through Explanations" at the 29th International Conference on Extending Database Technology (EDBT/ICDT 2026), taking place from March 24–27, 2026, at Tampere, Finland.
Archimedes Academic Fellow Andreas Lolos Presents Research at WACV 2026
16 March 2026
Archimedes Academic Fellow and a third-year PhD student at the National and Kapodistrian University of Athens in Greece, Andreas Lolos recently travelled to Tucson in Arizona, USA, and presented the paper "SGPMIL: Sparse Gaussian Process Multiple Instance Learning" at the IEEE/CVF Winter Conference on Applications of Computer Vision (WACV 2026).
6 Accepted Papers at ICLR 2026
11 March 2026
The Archimedes research unit of the Athena Research Center in Greece has six papers accepted at this year's International Conference on Learning Representations (ICLR) gathering, including one oral presentation. The acceptance rate for posters was about 25,8% and about 1,1% for oral presentations. Please bear in mind that ICLR, along with NeurIPS and ICML, is considered one of the three top-tier artificial intelligence and machine learning conferences in the world.
The project “ARCHIMEDES Unit: Research in Artificial Intelligence, Data Science and Algorithms” with code OPS 5154714 is implemented by the National Recovery and Resilience Plan “Greece 2.0” and is funded by the European Union – NextGenerationEU.
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