Hao, Huang, and Liu (STOC'26) recently showed that optimal quantum query complexity may require large workspace even for short-output problems, and asked whether a quantum query advantage over classical computation can itself require space. We resolve this question by exhibiting an explicit total Boolean function with quantum query complexity $Q=\widetilde{\Theta}(M)$, ... more >>>

The Shortest Vector Problem (SVP) and the Closest Vector Problem (CVP) are the fundamental algorithmic questions in the geometry of numbers. In the past two decades, their algorithmic complexity has been studied quite extensively due to their connection with lattice based cryptosystems. In this paper, we study these problems in ... more >>>

We give a unified hidden-derivative framework for list decoding and mutual correlated agreement of ordinary Reed--Solomon codes over prime fields, on arbitrary prescribed evaluation sets. For every fixed slack $\gamma>0$, every sufficiently large block length $n$, every prime $q\ge n$, and every dimension $1\le k\le(1-\gamma)n$, a deterministic algorithm finds all ... more >>>