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20 results for “Log-concavity”

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quant-phcs.DSmath-phTheoreticalRecentJun 22, 2026

Log-concavity and tunneling: adiabatic quantum optimization for convex functions (with a spike)

Arthur Braida, Elie Bermot, Simon Apers

This paper establishes log-concavity of the ground state for a large family of discrete, 1-dimensional Schrödinger operators, extending the analysis of the Hamming weight with a spike problem to more…

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cs.DScs.CCTheoreticalRecentJun 11, 2026

Sketching Intersection Profiles: A Simple Proof and Three Applications

Flavio Chierichetti, Mirko Giacchini, Ravi Kumar, Alessandro Panconesi +2 more

This paper settles the complexity of three sketching problems in graphs and distributions.

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cs.DSmath.PRTheoreticalRecentJul 24, 2026

HyperLogLog for probabilists

Lucas Gerin

This paper provides non-asymptotic and explicit estimates for the exponential deviation inequalities of the HyperLogLog estimator.

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math.PRcs.ITmath.MGTheoreticalRecentJul 15, 2026

Stochastic Domination of Gaussian Maxima: A Resolution to the Weak Simplex Conjecture

Abhijeet Mulgund

The paper proves a stochastic comparison for Gaussian maxima, resolving the Weak Simplex Conjecture and proving the Simplex Mean Width Conjecture.

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cs.DScs.CCmath.CORecentMay 29, 2026

High-Dimensional Expanders, the Sparsest Cut Problem, and Steurer's Conjecture

Farzam Ebrahimnejad, Shayan Oveis Gharan

The paper refutes Steurer's conjecture regarding the existence of large constant-separated sets within families of unit-norm vectors with low average correlation, using high-dimensional expanders to s…

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cs.DScs.CRmath.NTRecentMay 17, 2026

Module Lattice Security (Part III): Structured CVP Distance on the Log-Unit Lattice

Ming-Xing Luo

The paper analyzes the structured CVP distance on the log-unit lattice of cyclotomic fields, significantly reducing the conjectured CDPR factor for the ML-KEM cryptosystem from exponential to sub-poly…

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cs.CGcs.DMTheoreticalRecentJul 1, 2026

On Reconstructing a Convex Polygon from Partial Information

Alexander Baumann, Therese Biedl, Mahmoud Elashmawi, Simon D. Fink +2 more

This paper systematically explores the convex polygon reconstruction problem with specified sets of features, contributing new testing algorithms and hardness results.

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cs.ITcs.AIcs.LGRecentMay 30, 2026

Information-Theoretic Lower Bounds for Bit-Constrained Stochastic Optimization via a Reduction to Compressed Gaussian Mean Estimation

Munsik Kim

The paper establishes information-theoretic lower bounds for stochastic optimization using low-bit gradients by reducing the problem to compressed Gaussian mean estimation, yielding sharp bounds on co…

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cs.DMcs.DSTheoreticalRecentJul 7, 2026

Sudoku Grids That Require Many Clues

David Eppstein, Xinyu, Zhang

This paper proves that a majority of filled-in Sudoku grids require a logarithmic fraction of cells to be filled by clues, and constructs grids requiring 18 and 80 clues for 9x9 and 16x16 Sudoku, resp…

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cs.CRcs.ITRecentMay 4, 2026

Optimal Privacy-Utility Trade-Offs in LDP: Functional and Geometric Perspectives

Seung-Hyun Nam, Hyun-Young Park, Si-Hyeon Lee

The paper develops a unified theoretical framework to systematically characterize the optimal privacy-utility trade-off (PUT) and optimal Local Differential Privacy (LDP) channels for general statisti…

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cs.DSmath-phmath.CATheoreticalRecentJun 22, 2026

Computing Gaussian and exponential integrals in ${\Bbb R}^n$

Alexander Barvinok

This paper proves conditions for efficiently approximating expectations of certain functions with respect to standard Gaussian or symmetric exponential probability measures.

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cs.DMTheoreticalRecentJun 27, 2026

Local Minima in Quadratic-Penalty Relaxations of Binary Linear Programs

Cheng-Han Huang, Yongliang Sun, Chaoyan Huang, Ismail Alkhouri +1 more

The paper establishes conditions for QUBO formulations of combinatorial optimization problems that guarantee valid binary and feasible local minimizers using gradient-based methods.

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math.COcs.DMmath.SPTheoreticalRecentJun 22, 2026

Extremal Spanning Trees in Product Grid Graphs

Jiechen Zhang

This paper investigates how the extremality of fixed-volume spanning trees changes based on product-grid boundary factors in two and arbitrary dimensions.

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cs.LGmath.OCstat.MLTheoreticalRecentJun 29, 2026

Curvature-Weighted Gradient Diversity: A Noise Measure for Geometry-Adaptive SGD Schedules

Muhammad Hamza, Ayush Goel

This paper introduces Curvature-Weighted Gradient Diversity (CWGD), a geometry-aware measure for optimization noise that reduces the asymptotic optimization error floor by up to a factor of two compar…

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