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20 results for “Combinatorics”

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cs.LGmath.OCmath.PREmpiricalRecentJun 9, 2026

Data-Driven Dynamic Assortment in Online Platforms: Learning about Two Sides

Rahul Roy, Nur Sunar, Jayashankar M. Swaminathan

This paper studies a dynamic assortment problem on a two-sided service platform with incomplete information and heterogeneous customers, and develops a data-driven algorithm to learn parameters and op…

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cs.DScs.DMTheoreticalRecentJun 11, 2026

(Un)ranking Permutation Classes

Nathanaël Hassler, Vincent Vajnovszki

This paper presents methods for ranking and unranking permutations avoiding a pattern of length three in lexicographic or colexicographic order.

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cs.DMTheoreticalRecentJun 11, 2026

Fibonacci and Catalan Numbers Meet in Staircase Polyominoes

Jean-Luc Baril, José Luis Ramírez, Samuel Ramírez, Diego Villamizar

This paper derives multivariate generating functions to refine the enumeration of Fibonacci polyominoes.

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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.DMTheoreticalRecentJun 11, 2026

Snake Polyominoes of Maximal Area in a Rectangle

Alexandre Blondin Massé, Alain Goupil

This paper presents an algorithm to generate snake-like polyominoes within a given rectangle and provides exact formulas for the maximal area of such polyominoes for certain dimensions.

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cs.DMcs.DSEmpiricalRecentJun 11, 2026

Exhaustive Generation of Genus-One Knot and Link Diagrams via Maps on the Torus

Alexander Omelchenko

This paper presents an algorithmic framework for exhaustively generating and tabulating knot and link diagrams on the thickened torus.

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cs.CGRecentMay 29, 2026

How Many Slopes Does Polynomial Area Cost?

Michael A. Bekos, Eleni Katsanou, Philipp Kindermann, Maria Eleni Pavlidi

The paper systematically studies the trade-offs between the number of slopes, bends per edge, and required area for planar drawings of bounded-degree graphs, providing new constructions for high-degre…

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cs.CRRecentApr 30, 2026

SBN Explorer: An Empirical Study of Cryptographic Boolean Networks

Arnaud Valence

The paper systematically explores a vast design space of cryptographic Boolean networks by formalizing six structural constraints, finding that optimal designs result from sparse, mutually compatible…

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cs.CGRecentMay 31, 2026

On Fréchet Traveling Salesmen Problems

Omrit Filtser, Tzalik Maimon, Michal Moiseev

This paper introduces a new variant of the Traveling Salesman Problem where the goal is to find two paths connecting a set of sites while minimizing the Fréchet distance between the two paths.

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cs.DMmath.COmath.DSTheoreticalRecentJun 11, 2026

The Curious Case of Reversible Elementary Second Order Cellular Automaton 115

Enrico Formenti, Supreeti Kamylia

The paper proves that the reversible elementary second order cellular automaton rule 115 is periodic when started on finite initial configurations.

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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.CRcs.ITRecentMar 24, 2026

The Power of Power Codes: New Classes of Easy Instances for the Linear Equivalence Problem

Michele Battagliola, Anna-Lena Horlemann, Abhinaba Mazumder, Rocco Mora +3 more

This paper identifies new, algebraically weak classes of instances for the Linear Equivalence Problem (LEP) by generalizing techniques from the Permutation Equivalence Problem (PEP) using power codes…

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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.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.DMcs.ITTheoreticalRecentJun 11, 2026

Entropic Generation of Binary Words

Olivier Bodini, Francis Durand

This paper introduces a novel algorithm for generating k Hamming weight binary words in linear time while minimizing random bit consumption.

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math.HOcs.CRRecentMay 31, 2026

On the History of the Square and Multiply Algorithm

Nuh Aydin, Mohammad K. Azarian, Omid Khormali, Ghaya Mtimet

This paper traces the historical development of the square-and-multiply algorithm, arguing that while its conceptual foundation dates back to ancient Indian prosody, its formal articulation as a gener…

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math.LOcs.CCTheoreticalRecentJun 11, 2026

Extended Frege proofs, circuits and rewriting

Jan Krajicek

This paper proves several properties about Extended Frege proof systems and circuit equivalence.

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cs.DMTheoreticalRecentJun 11, 2026

A Class of Multiparameter Signless Stirling Numbers of the First Kind and their $q$-Analogues

Violetta E. Piperigou, Malvina G. Vamvakari

This paper provides a probabilistic derivation of multiparameter signless Stirling numbers and their q-analogues.

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