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20 results for “NP-hard”

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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.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.LGRecentJun 1, 2026

Regularized Large Neighborhood Search

Germain Vivier-Ardisson, Laurent Demonet, Axel Parmentier, Mathieu Blondel

The paper introduces Regularized Large Neighborhood Search (RLNS), a method that adapts the LNS heuristic into an efficient MCMC sampler for combinatorial optimization, allowing end-to-end learning wi…

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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.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.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.GTcs.CCTheoreticalRecentJun 11, 2026

On Cutting Cakes and Crossing Curves

Alexandros Hollender, Gilbert Maystre, Kilian Risse

The paper shows that the envy-free cake-cutting problem with three agents is intractable and establishes the first lower bounds for the Jordan curve problem.

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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.PLcs.CCcs.DBRecentJun 1, 2026

From Time to Space: The Impact of Linearity in Higher-Order Datalog

Angelos Charalambidis, Babis Kostopoulos, Panos Rondogiannis

The paper analyzes a fragment of Higher-Order Datalog, showing that restricting recursion to a linear form shifts its expressive power from time complexity to space complexity, specifically capturing…

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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.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.LGcs.AIRecentMay 29, 2026

From Rashomon Theory to PRAXIS: Efficient Decision Tree Rashomon Sets

Zakk Heile, Hayden McTavish, Varun Babbar, Margo Seltzer +1 more

The paper introduces PRAXIS, a novel algorithm that efficiently approximates the computation of 'Rashomon sets' for decision trees, significantly reducing memory and runtime complexity.

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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.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.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.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.NEcs.AIRecentMay 29, 2026

Linear Ordering Problem: Time for a Change

Fabrizio Fagiolo, Marco Baioletti, Valentino Santucci

The paper addresses limitations in the Linear Ordering Problem (LOP) by introducing a novel benchmark suite derived from current economic data and an algorithmic scheme to generate diverse, high-quali…

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cs.LOcs.AIRecentMay 28, 2026

Neural Network Verification using Partial Multi-Neuron Relaxation

Ido Shmuel, Guy Katz

The paper introduces partial multi-neuron relaxation, a novel verification technique that selectively computes tight linear bounds for a small subset of neurons to improve the efficiency and tightness…

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cs.AIcs.LORecentMay 28, 2026

Reliable Reasoning with Large Language Models via Preference-Based Maximum Satisfiability

Pedro Orvalho, Marta Kwiatkowska, Guillem Alenyà, Felip Manyà

The paper proposes a hybrid reasoning framework where Large Language Models (LLMs) generate code to encode complex optimization problems into a preference-based Maximum Satisfiability (MaxSAT) format,…

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cs.CLcs.AIRecentJun 1, 2026

PlanarBench: Evaluating LLM Spatial Reasoning via Planar Graph Drawing

Oleksandr Nikitin

PlanarBench introduces a novel benchmark to test LLM spatial reasoning by requiring them to draw planar graphs as ASCII art from an edge list, finding that edge count is a stronger difficulty predicto…

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