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20 results for “symmetric group”

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cs.DMTheoreticalRecentJun 11, 2026

On the Impossibility of Parabolic Factorization of certain Kazhdan-Lusztig Basis Elements

Tommy Parisi, Mark Skandera, Ben Spahiu, Jiayuan Wang

This paper describes a set of permutations for which a specific factorization of basis elements in the type-A Hecke algebra leads to combinatorial interpretations of certain polynomials.

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math.ATcs.DMmath.COTheoreticalRecentJun 11, 2026

Computing stable homology representations of graph configuration spaces

Eric Ramos, Claudia He Yun

Ramos and White's theorem on multiplicity stability of rational homology for configuration spaces of certain graphs is extended and computed for various families of graphs using computer algebra.

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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.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.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.DMEmpiricalRecentJun 11, 2026

k-Convex Polyominoes by Semi-perimeter

Andrew R. Conway, Anthony J. Guttmann

The paper provides the conjectured solution for the generating function of k-convex polyominoes, based on analysis of generated enumeration data.

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cs.CRcs.ITRecentApr 20, 2026

Subcodes of Lambda-Gabidulin Codes for Compact-Ciphertext Cryptography

Freddy Lendé Metouké, Hervé Talé Kalachi, Hermann Tchatchiem Kamche, Ousmane Ndiaye +1 more

The paper analyzes subcodes of lambda-Gabidulin codes to construct highly efficient McEliece-like and Niederreiter-like cryptosystems, demonstrating that random subcodes of classical Gabidulin codes y…

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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.LGRecentJun 1, 2026

Riemannian Gradient Descent for Low-Rank Architectures

Nicholas Knight

The paper investigates applying Riemannian optimization techniques to low-rank matrix parameters for deep learning, but finds that the proposed methods do not conclusively outperform the AdamW baselin…

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cs.CRquant-phRecentMay 26, 2026

A Note on Boosting Uncloneable Encryption in Microcrypt

James Bartusek, Eli Goldin

The paper establishes that the existence of many-time secure uncloneable encryption (UCE) can be shown to follow from relatively weak assumptions, such as the existence of many-time secure symmetric k…

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cs.CRRecentJun 4, 2026

GCD: Garbled, Corrected, Demonstrandum -- Fixing and Proving Go's Extended GCD Implementation

Linard Arquint

This paper fixes two subtle bugs in Go's extended GCD implementation, which is critical for RSA key generation, and formally proves the correctness and termination of the corrected code.

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cs.LGRecentJun 1, 2026

Expressivity of congruence-based architectures for DNNs on positive-definite matrices

Antonin Oswald, Estelle Massart

The paper analyzes congruence-based neural architectures for classifying positive-definite matrices, demonstrating that common semi-orthogonality constraints severely limit the model's expressivity.

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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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math.COcs.CRRecentApr 21, 2026

Cyclic Equalizability Characterized by Parikh Vectors

Sarunyu Thongjarast, Sarit Pasiphol, Suthee Ruangwises

This paper completely characterizes cyclic equalizability for two words over any finite alphabet by proving that the words must share the same Parikh vector.

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cs.ITcs.CRRecentMar 18, 2026

A New Approach to Code Smoothing Bounds

Tsuyoshi Miezaki, Yusaku Nishimura, Katsuyuki Takashima

The paper proposes a novel method using random walks and equitable partitions to derive an inequality for the total variation distance of codes, generalizing existing bounds for finite abelian groups.

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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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math.NTcs.CRRecentMar 26, 2026

Second order Recurrences, quadratic number fields and cyclic codes

Minjia Shi, Xuan Wang, Bouazzaoui Zakariae, Jon-Lark Kim +1 more

The paper investigates generalized Wall-Sun-Sun primes, $WSS(d)$, and uses them to study the weight distributions of specific cyclic codes defined over $ ext{F}_p$ and $ ext{Z}_{p^2}$.

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