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Electronic Colloquium on Computational Complexity

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TR26-242 | 26th September 2026
Shiva Kintali

On the Fixed-Order Strong Komlós Conjecture

The strong Koml\'os conjecture asserts that every ordered family of Euclidean-unit vectors admits a signing whose signed prefixes have uniformly bounded \(\ell_\infty\)-norm. We disprove this conjecture by constructing explicit finite families with unbounded fixed-order prefix discrepancy. At level \(k\), our integer matrix has \(d_k=2^{2^k-1}\) rows and exactly \(s_k=2^k\) nonzero \(\pm1\) ... more >>>


TR26-241 | 1st October 2026
Xin Li, Yan Zhong

Non-Malleable Affine Extractors with Small Error and Complexity Lower Bound

We construct explicit non-malleable affine extractors for every constant entropy rate, with linear output length and exponentially small error, against any fixed number of affine tamperings without fixed points. For every fixed $00$.

Our extractors derandomize the lossless lifting of Efremenko and Itsykson (STOC 2026). For every fixed $0<\xi<1$, this ... more >>>


TR26-240 | 1st October 2026
Eshan Chattopadhyay, Noam Ringach, Nicholas Spooner

Two-Sided Product Expanding Codes via Rademacher Matrices

Beginning with the work of Dinur, Lin, and Vidick (FOCS, 2024), tensor codes with constant product expansion have been foundational to recent advances in quantum locally testable codes (qLTCs) based on cubical complexes. Informally, product expansion says that any low-weight parity check of the tensor code can be written as ... more >>>



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