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Electronic Colloquium on Computational Complexity

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TR26-166 | 4th September 2026
Abhranil Chatterjee, Prerona Chatterjee, Utsab Ghosal, Partha Mukhopadhyay

Quasi-polynomial Frege Simulation of IPS beyond Noncommutativity

Grochow and Pitassi (2018) introduced the algebraic proof system, the Ideal Proof System (IPS), which connects algebraic circuit complexity to propositional proof complexity. They showed that propositional proof systems such as Extended Frege (Frege) are equivalent to circuit IPS (formula IPS) if the correctness of PIT for circuits (formulas) can ... more >>>


TR26-165 | 4th September 2026
Joshua Grochow, Gulce Kardes, Michael Levet

Group Isomorphism and the Polylogarithmic-Time Hierarchy: Depth-2$\frac{1}{2}$ Circuits and Lower Bounds

In this paper, we investigate the low-depth circuit complexity of Group Isomorphism in the multiplication (Cayley) table model. We prove the first circuit lower bounds for Group Isomorphism: namely, we show that every family of depth-$2$ Boolean circuits deciding Group Isomorphism requires quasipolynomial-size. We complement this with upper bounds of ... more >>>


TR26-164 | 4th September 2026
Joshua Brakensiek, Yeyuan Chen, Aaron (Louie) Putterman, Zihan Zhang, Kai Zhe Zheng

Algorithmic List Decoding of Reed–Solomon Codes up to Capacity in the Low-Rate Regime

Revisions: 1

We provide a deterministic polynomial-time list decoding algorithm for Reed-Solomon codes over prime fields that approaches list decoding capacity on every evaluation set in the low (constant) rate regime.

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