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20 results for “Computational complexity theory”

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cs.CRmath.AGRecentApr 4, 2026

Explainable PQC: A Layered Interpretive Framework for Post-Quantum Cryptographic Security Assumptions

Daisuke Ishii, Rizwan Jahangir

The paper proposes 'Explainable PQC,' a layered interpretive framework designed to structure and clarify how post-quantum cryptographic security assumptions are represented and communicated, particula…

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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.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.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.CRRecentMar 20, 2026

Constraint Migration: A Formal Theory of Throughput in AI Cybersecurity Pipelines

Surasak Phetmanee

The paper develops a formal theory to analyze how throughput changes in AI-enhanced cybersecurity pipelines when stage capacities are perturbed by multipliers.

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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.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.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.LOcs.CRRecentApr 11, 2026

A Constructive Proof of Rice's Theorem and the Halting Problem via Hilbert's Tenth Problem

Jonathan Brossard

The paper provides a constructive, intuitionistically valid proof of Rice's Theorem and the Halting Problem undecidability by reducing the problem to the undecidability of Hilbert's Tenth Problem (MRD…

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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.CRcs.CCRecentJun 2, 2026

Collision Resistance of Single-Layer Neural Nets

Marco Benedetti, Andrej Bogdanov, Enrico M. Malatesta, Marc Mézard +4 more

The paper analyzes the algorithmic complexity of finding collisions in single-layer binary neural networks, establishing that the collision resistance depends critically on the activation function's t…

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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.CCq-bio.PERecentMay 29, 2026

Tree Containment Parameterized by Scanwidth

Leo van Iersel, Mark Jones, Mathias Weller

This paper develops a parameterized algorithm for the NP-complete Tree Containment problem, showing it can be solved efficiently based on a structural parameter called scanwidth.

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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.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.CCRecentMay 31, 2026

Recursive Jump Operators and Optimal Proof Systems

Fabian Egidy

The paper investigates the relationship between optimal proof systems and recursive jump operators, showing that while the existence of a jump operator rules out optimality, the converse is provably h…

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quant-phcs.CRmath.CORecentMay 17, 2026

Module Lattice Security (Part IV): Probabilistic Polynomial Quantum Attack on Module-LWE over 2-Power Cyclotomics

Ming-Xing Luo

This paper presents a quantum attack on Module-LWE based lattice schemes like ML-KEM, demonstrating a polynomial-time quantum algorithm with a high success probability.

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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.CRRecentMar 19, 2026

A Complexity Hierarchy of Shuffles in Card-Based Protocols

Tomoki Ono, Suthee Ruangwises

This paper establishes a complexity hierarchy for shuffle operations used in card-based cryptography, classifying them by implementation difficulty and proving separations between these levels.

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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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