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.
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This paper is about the proximity gaps phenomenon for Reed-Solomon codes.
Very roughly, the proximity gaps phenomenon for a code $\mathcal C \subseteq \mathbb F_q^n$ says that for two vectors $f,g \in \mathbb F_q^n$, if sufficiently many linear combinations $f + z \cdot g$ (with $z \in \mathbb F_q$) ...
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A large alphabet Locally Decodable Code (LDC) $C:\Sigma^{k} \to \Sigma'^{n}$, where $\Sigma'$ may be large, is a code where each symbol of $x$ can be decoded by making few queries to a noisy version of $C(x)$. The rate of $C$ is its information rate, namely $\frac{k \log (|\Sigma|) }{n \log ... more >>>
In a breakthrough in the long-going attempt to construct good explicit tree codes, Cohen, Haeupler and Schulman (CHS) (STOC 2018) constructed constant-distance tree codes with rate 1/O(log log n). In their construction a large-alphabet tree code is used as a core element - and they were able to utilize polynomials ... more >>>
