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20 results for “PP-hardness”

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cs.LGcs.AIEmpiricalRecentJun 4, 2026

PC Layer: Polynomial Weight Preconditioning for Improving LLM Pre-Training

Senmiao Wang, Tiantian Fang, Haoran Zhang, Yushun Zhang +3 more

This paper proposes a preconditioning layer for stable weight conditioning in LLM training.

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cs.LOcs.CCTheoreticalRecentJun 12, 2026

Algebraic Circuits Over Sum and Shift and Existential Presburger Arithmetic with Divisibility

Ignacio Barros, Michaël Cadilhac, Guillermo A. Pérez

This paper proves that the satisfiability problem of existential Presburger arithmetic extended with divisibility predicates (EPAD) is PP-hard.

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cs.CRcs.CCRecentMay 11, 2026

Hardness Amplification for (Sparse) LPN

Divesh Aggarwal, Rishav Gupta, Li Zeyong

The paper establishes new hardness amplification results for Learning Parity with Noise (LPN) and its sparse variants, showing that solving the problem on a small fraction of instances implies solving…

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cs.CCcs.DMcs.DSRecentJun 1, 2026

$O(n +f(k))$: Truly Linear FPT

Benjamin Merlin Bumpus, Rod Downey, Tala Eagling-Vose, Jessica Enright +6 more

The paper introduces and explores Truly Linear FPT (TLFPT), a complexity class defined by $O(n) + f(k)$, demonstrating that it is a strict subset of standard Linear FPT and providing new algorithms fo…

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cs.CRRecentJun 4, 2026

Towards Worst-case Hardness for Low-Noise LPN

Divesh Aggarwal, Rishav Gupta, Hai Hoang Nguyen, Kel Zin Tan +1 more

The paper presents a new worst-case to average-case reduction for the Learning Parity with Noise (LPN) problem, achieving hardness for inverse-polynomial noise rates previously unattainable.

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cs.GTcs.CCRecentMay 31, 2026

Hardness of Approximate Hylland-Zeckhauser Equilibria

Mark Braverman, Jingyi Liu, Eric Xue, Chenghan Zhou

The paper establishes that finding approximate Hylland-Zeckhauser equilibria (a type of market allocation) is computationally hard, specifically showing it is PPAD-hard under certain complexity assump…

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cs.CRRecentApr 12, 2026

Public Key Encryption from High-Corruption Constraint Satisfaction Problems

Isaac M Hair, Amit Sahai

The paper introduces a novel public key encryption scheme with high security by leveraging the conjectured intractability of two types of highly corrupted constraint satisfaction problems (CSPs).

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cs.CCq-bio.QMRecentJun 1, 2026

Structure-Informed Multiple Sequence Alignment: A Formal Model and Hardness Results

Yoshiki Kanazawa, Naphan Benchasattabuse, Michal Hajdušek, Rodney Van Meter

The paper formally models structure-informed multiple sequence alignment (MSA-S) as an NP-complete optimization problem, establishing a strong computational complexity baseline for the field.

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cs.DMcs.CGTheoreticalRecentJun 11, 2026

On the Counting Sequence of Z-convex Polyominoes

Luca Castelli, Paolo Massazza

This paper presents a set of formulas and equations to compute the longest counting sequence of convex polyominoes of degree of convexity at most 2.

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cs.CCcs.DSRecentMay 30, 2026

Search-space Reduction for Boolean MinCSPs via Essential Constraints

Bart M. P. Jansen, Ruben F. A. Verhaegh

The paper introduces a method to efficiently detect 'essential' constraints in Boolean MinCSPs, significantly reducing the search space for solving these problems and providing a dichotomy theorem for…

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cs.CRRecentApr 20, 2026

Privacy-Preserving Product-Quantized Approximate Nearest Neighbor Search Framework for Large-scale Datasets via A Hybrid of Fully Homomorphic Encryption and Trusted Execution Environment

Shozo Saeki, Minoru Kawahara, Hirohisa Aman

The paper proposes a Privacy-Preserving Product-Quantization Approximate Nearest Neighbor (PPPQ-ANN) framework that achieves practical performance and strong privacy guarantees for large-scale nearest…

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cs.CCRecentMay 31, 2026

On the Complexity of Recurrence Evaluation

Artem Parfenov, Michael Vyalyi

This paper analyzes the computational complexity of evaluating recurrent functions, showing that the complexity depends heavily on how the input offsets are encoded and the structure of the recurrence…

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cs.CRcs.DScs.LGRecentMay 27, 2026

Privately Estimating Monotone Statistics in Polynomial Time

Gavin Brown, Ephraim Linder, Mahbod Majid, Vikrant Singhal

The paper introduces novel, efficient differentially private algorithms for estimating monotone statistics, significantly improving sample complexity compared to existing methods.

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cs.CCcs.LGcs.LORecentMay 28, 2026

The Complexity of Verifying Feedforward Neural Networks in Quantised Settings

Eric Alsmann, Martin Lange, Marco Sälzer

This paper analyzes the computational complexity of verifying feedforward neural networks when their weights are restricted to finite-width arithmetic, finding that verification remains NP-complete fo…

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cs.DScs.LGstat.MLRecentJun 3, 2026

A General Framework for Dynamic Consistent Submodular Maximization

Paul Dütting, Federico Fusco, Silvio Lattanzi, Ashkan Norouzi-Fard +2 more

The paper develops a general framework for dynamic consistent submodular maximization, achieving constant-factor approximations with sublinear consistency for both cardinality and rank-$k$ matroid con…

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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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math.OCcs.AIcs.NERecentMay 27, 2026

Preference-Shaped Expected Hypervolume and R2 Improvement: Exact Computation and Monotonicity

Michael T. M. Emmerich

The paper analyzes preference-shaped expected improvement criteria for Bayesian multiobjective optimization, precisely characterizing when transformations preserve key properties like exact computatio…

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cs.CCeess.SYmath.AGRecentMay 29, 2026

Verifying global identifiability of parametric linear ODE models is NP-hard

Alexey Ovchinnikov, Pedro Soto

This paper determines that verifying global parameter identifiability for linear ODE models is an NP-hard problem, establishing a computational complexity boundary for the field.

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cs.AIcs.CLcs.LORecentMay 27, 2026

Satisfiability Solving with LLMs: A Matched-Pair Evaluation of Reasoning Capability

Leizhen Zhang, Shuhan Chen, Sheng Chen

The paper evaluates LLM reasoning on Boolean satisfiability (SAT) problems, concluding that conventional metrics are misleading and proposing a paired-formula protocol with Accurate Differentiation Ra…

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cs.CRRecentMar 28, 2026

Attacks on Sparse LWE and Sparse LPN with new Sample-Time tradeoffs

Shashwat Agrawal, Amitabha Bagchi, Rajendra Kumar

The paper presents two new attacks on decisional $k$-sparse LWE and LPN problems for higher moduli $q$ by generalizing the Kikuchi method using graph theory.

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