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Huacheng Yu

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Preprint Aug 2026

Quadratic Probing Insertions Are $\epsilon^{-(1+o(1))}$

First proposed in 1968, quadratic probing has stood for more than half a century as one of the simplest and most widely used hash-table designs in computer science. It is conjectured that, at load factor $1 - \epsilon$, the hash table achieves $O(\epsilon^{-1})$ expected insertion time. But even proving a bound of the...

Yang Hu, William Kuszmaul, Jingxun Liang et al. · 0 citations
Preprint Jul 2026

Adversarial Robustness for Small Frequency Moments and a Weak Equivalence Theorem for Turnstile Streams

It is proved that for any sub-multiplicative norm, the existence of an efficient classical linear sketch is equivalent to the existence of an efficient robust turnstile algorithm, up to polynomial factors, formalizing $L_1$ embeddability as the fundamental mechanism governing both models.

Elena Gribelyuk, Honghao Lin, David P. Woodruff et al. · 0 citations

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