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W1976697079 abstract "We give the first representation-independent hardness results for PAC learning intersections of halfspaces, a central concept class in computational learning theory. Our hardness results are derived from two public-key cryptosystems due to Regev, which are based on the worst-case hardness of well-studied lattice problems. Specifically, we prove that a polynomial-time algorithm for PAC learning intersections of n epsi halfspaces (for a constant epsi > 0) in n dimensions would yield a polynomial-time solution to Otilde(n 1.5 )-uSVP (unique shortest vector problem). We also prove that PAC learning intersections of n epsi low-weight half-spaces would yield a polynomial-time quantum solution to Otilde(n 1.5 )-SVP and Otilde(n 1.5 )-SIVP (shortest vector problem and shortest independent vector problem, respectively). By making stronger assumptions about the hardness of uSVP, SVP, and SIVP, we show that there is no polynomial-time algorithm for learning intersections of log c n halfspaces in n dimensions, for c > 0 sufficiently large. Our approach also yields the first representation-independent hardness results for learning polynomial-size depth-2 neural networks and polynomial-size depth-3 arithmetic circuits" @default.
W1976697079 created "2016-06-24" @default.
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W1976697079 date "2006-01-01" @default.
W1976697079 modified "2023-09-23" @default.
W1976697079 title "Cryptographic Hardness for Learning Intersections of Halfspaces" @default.
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W1976697079 doi "https://doi.org/10.1109/focs.2006.24" @default.
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