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Author

V. Guruswami

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Preprint Sep 2026

Almost Optimal FPT Inapproximability for k-SetCover

We show that $\bigl(\frac{\log n}{\log\log n}\bigr)$-approximate parameterized $k$-SetCover is W[1]-hard, and has no $n^{o(k/\log k)}$-time algorithms under ETH. This improves upon the previous best factors $\bigl(\frac{\log n}{\log\log n}\bigr)^{1/k}$ in (Lin, 2019) and $(\log n)^{1/\operatorname{poly}(k)}$ in (Karthi...

V. Guruswami, Xuan-Di Ren · 1 citation
Preprint Aug 2026

Binary code rate bounds via classical--quantum channels

We derive the four principal asymptotic rate-distance tradeoffs for binary codes---Plotkin, Elias--Bassalygo, and the two McEliece--Rodemich--Rumsey--Welch (MRRW) bounds---from one theorem, the ``pretty good criterion.''If the bit error rate under the pretty good measurement (PGM)---the quantum analog of posterior samp...

Omar Alrabiah, V. Guruswami · 3 citations · ⚡2
Preprint Aug 2026

Average-Radius List-Decodability of Random Linear Codes

We prove that for every prime power $q$ and every $p \in (0, 1-1/q)$, a random $\mathbb{F}_q$-linear code of rate $1 - h_q(p) - \epsilon$ is $(p, C_{p,q}/\epsilon)$-average-radius list-decodable with probability at least $1 - q^{-\Omega(n)}$, i.e., for every center $y \in \mathbb{F}_q^n$, the $C_{p,q}/\epsilon$ codewor...

V. Guruswami, Shi-Lun Li, Mihir Singhal · 1 citation

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