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ECCC
Electronic Colloquium on Computational Complexity

Under the auspices of the Computational Complexity Foundation (CCF)

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About the ECCC

What we do and why

The Electronic Colloquium on Computational Complexity (ECCC) was established in 1994 as a forum and repository for the rapid and widespread interchange of ideas, techniques, and research in computational complexity. Posting on the ECCC has the status of a technical report. The Electronic Colloquium on Computational Complexity welcomes papers, short notes, and surveys, with
  • relevance to the theory of computation,
  • clear mathematical profile, and
  • strictly mathematical format.

Central topics

  • models of computation and their complexity.
  • complexity bounds and trade-offs (with the emphasis on lower bounds).
  • complexity theoretic aspects of specific areas including coding theory, combinatorics, cryptography, game theory, logic, machine learning, optimization, property testing, and quantum computation.
For more details see the Call for Papers.

More reading

Here are some papers on the idea and concept of electronic colloquia and ECCC.

Latest News
9th April 2023 12:21

Service Interruption

In the last few days, a Denial of Service attack was launched on universities in Israel, leading the administrators of the Israel Academic network to block access to it from the global internet. Consequently, websites such as ECCC have been accessible only from within the Israeli and European academic networks.

It seems that this blocking was just removed, and we hope it will not be put back in the future.

Needless to say, deciding on such blocking is not in our control, but we do apologize for this disruption of service.


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Latest Report Titles
Latest Reports
TR25-146 | 15th October 2025
Joshua Brakensiek, Yeyuan Chen, Manik Dhar, Zihan Zhang

From Random to Explicit via Subspace Designs With Applications to Local Properties and Matroids

In coding theory, a common question is to understand the threshold rates of various local properties of codes, such as their list decodability and list recoverability. A recent work Levi, Mosheiff, and Shagrithaya (FOCS 2025) gave a novel unified framework for calculating the threshold rates of local properties for random ... more >>>


TR25-145 | 2nd October 2025
Sabee Grewal, William Kretschmer

Unentanglement and Post-Measurement Branching in Quantum Interactive Proofs

We investigate two resources whose effects on quantum interactive proofs remain poorly understood: the promise of unentanglement, and the verifier’s ability to condition on an intermediate measurement, which we call post-measurement branching. We first show that unentanglement can dramatically increase computational power: three-round unentangled quantum interactive proofs equal NEXP, even ... more >>>


TR25-144 | 7th October 2025
Siddhartha Jain, Vishnu Iyer, Rolando Somma, Ning Bao, Stephen Jordan

Efficient Quantum Hermite Transform

We present a new primitive for quantum algorithms that implements a discrete Hermite transform efficiently, in time that depends logarithmically in both the dimension and the inverse of the allowable error. This transform, which maps basis states to states whose amplitudes are proportional to the Hermite functions, can be interpreted ... more >>>


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