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20 results for “number of solutions”

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math.COcs.ITTheoreticalRecentJun 12, 2026

Counting contiguous superregular $4 \times 4$ matrices

Carlo Sanna

The paper explains a method for finding the number of solutions to a system of multivariate polynomial inequalities over a finite field and applies it to find formulas for the number of contiguous sup…

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cs.DMcs.DSTheoreticalRecentJul 7, 2026

Sudoku Grids That Require Many Clues

David Eppstein, Xinyu, Zhang

This paper proves that a majority of filled-in Sudoku grids require a logarithmic fraction of cells to be filled by clues, and constructs grids requiring 18 and 80 clues for 9x9 and 16x16 Sudoku, resp…

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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.CCTheoreticalRecentJul 24, 2026

Ice Walk is ASP-Complete

Papangkorn Apinyanon

The authors prove that the solution-search problem for Ice Walk puzzle is ASP-complete by reducing Hamiltonian cycles in a maximum-degree-3 spanning subgraph of a rectangular grid graph to Ice Walk so…

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math.COcs.CCTheoreticalRecentJul 9, 2026

Polynomial Binary Optimization

Endre Boros

The paper develops an explicit multi-linear polynomial form for binary polynomial optimization problems after eliminating a subset of variables, allowing for characterization of new special classes wi…

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cs.NEEmpiricalRecentJun 19, 2026

On the Use of Survival Selection Methods for Evolutionary Diversity Optimisation

Adel Nikfarjam, Jakob Bossek, Aneta Neumann, Frank Neumann

This paper investigates the benefits of generating multiple solutions in each generation for Evolutionary Diversity Optimisation (EDO) and proposes efficient methods to achieve it.

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cs.CCmath.COTheoreticalRecentJun 28, 2026

On the Complexity of Counting Orderings in Graphs

Marcelo Arenas, María Alejandra Schild, Bernardo Subercaseaux

This paper shows #P-completeness for several graph counting problems using a new technique.

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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.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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math.COcs.DMmath.NTTheoreticalRecentJul 8, 2026

Small Matrices with Large Inverses: Unimodular $4 \times 4$ Cases

Steven Finch

This paper investigates the closeness of singularity for $n imes n$ unimodular matrices, specifically for $(2k+1)$-ary and $(k+1)$-ary cases of $4 imes 4$ nonnegative unimodular matrices.

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math.NTcs.CRcs.DSTheoreticalRecentJul 3, 2026

Calculating the floor of y**(1/m)

Alexandros V. Gerbessiotis

This paper presents two algorithms using the Newton-Raphson method to calculate the floor of y**(1/m) for natural integer numbers y > 2 and m > 1, which can be used to determine if y is an integer pow…

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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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math.COcs.ITTheoreticalRecentJul 15, 2026

Independent Sets in Multiset Profile Graphs via Weighted Local Covers

Aryeh Lev Zabokritskiy

This paper studies the maximum size of an independent set in the discrete simplex graph and provides new bounds using translated smaller graphs and finite rational linear systems.

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math.NTcs.DScs.SCTheoreticalRecentJun 22, 2026

Faster enumeration of primes

David Harvey

This paper introduces new algorithms for finding prime numbers up to a given bound, achieving a speedup of log N over the sieve of Eratosthenes.

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math.COcs.DMEmpiricalRecentJul 7, 2026

Symmetric lexicographic symmetric-subset reverse search for the enumeration of circuits, cocircuits, and triangulations up to symmetry

Jörg Rambau

This paper introduces and implements variants of the symmetric lexicographic symmetric-subset reverse search framework for enumerating symmetric feasible subsets of a finite set, applying it to cocirc…

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math.PRcs.DMcs.FLTheoreticalRecentJun 28, 2026

Note on Finite-Automata Bernoulli Factories for Rational Functions

Renato Paes Leme, Jon Schneider

This paper identifies a technical oversight in Mossel and Peres (2005) theorem on designing Bernoulli factories for multivariable functions and provides a counterexample.

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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.DSTheoreticalRecentJul 9, 2026

Primal-Dual Online Algorithms for the Parking Permit Problem

Christian Coester, Alex Turoczy

The paper re-examines the Parking Permit Problem using the primal-dual scheme, obtaining simple algorithms with superior performance guarantees and providing near-matching lower bounds.

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