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20 results for “prescribed row and column sums”

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math.PRcs.DSmath.COTheoreticalRecentJun 21, 2026

Spectral Gap for the Binary Fixed-Margin Swap Chain

Weibo Fu, Qian Qin, Guanyang Wang

This paper proves an inverse-polynomial spectral-gap bound for the lazy swap chain on binary matrices with prescribed row and column sums, which is a standard sampler for fixed-margin null models.

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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.DMcs.DSTheoreticalRecentJul 8, 2026

Ranking and Rank Aggregation with Matroid Prefix Constraints

Seiei Ando, Yu Yokoi

This paper studies ranking and aggregation under Kendall tau distance with matroid or flag matroid constraints on prefixes.

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cs.DMTheoreticalRecentJun 27, 2026

Local Minima in Quadratic-Penalty Relaxations of Binary Linear Programs

Cheng-Han Huang, Yongliang Sun, Chaoyan Huang, Ismail Alkhouri +1 more

The paper establishes conditions for QUBO formulations of combinatorial optimization problems that guarantee valid binary and feasible local minimizers using gradient-based methods.

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cs.DScs.DMTheoreticalRecentJul 23, 2026

Approximation Algorithms for Inventory Problems with Decomposable Submodular Ordering Costs

Retsef Levi, Georgia Perakis, Emily Zhang

This paper proposes an approximation algorithm for the submodular joint replenishment problem with decomposable submodular ordering cost functions, achieving an O(k)-approximation.

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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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math.CAcs.CCmath.COTheoreticalRecentJul 15, 2026

Towards a characterization of idempotent Schur multipliers

Marcel K. Goh, Hamed Hatami

This paper shows that any boolean matrix with bounded factorization norm can be expressed as a signed sum of blow-up identity matrices, and this result has applications to matrix sequences and complex…

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cs.DSTheoreticalRecentJul 21, 2026

Indexing Range Maximum-Sum Segment Queries with Offsets

Seungbum Jo, Dominik Köppl

This paper presents an index for the maximum segment sum problem with query offset and range, using O(log^2 n) query time and O(n log n) space.

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cs.DSTheoreticalRecentJun 19, 2026

Online Stacking with a Few Load/Unload Points

Martin Olsen

A simple online algorithm is presented for the stacking problem to avoid shifts with a sufficient condition involving stacking area dimension, load/unload points, and maximum items.

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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.DSmath-phmath.CATheoreticalRecentJun 22, 2026

Computing Gaussian and exponential integrals in ${\Bbb R}^n$

Alexander Barvinok

This paper proves conditions for efficiently approximating expectations of certain functions with respect to standard Gaussian or symmetric exponential probability measures.

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cs.DSTheoreticalRecentJul 17, 2026

A Unified Theory of Sparsification

Sanjeev Khanna, Aaron Putterman, Madhu Sudan

This paper introduces a structural theorem for the sparsifiability of real-valued codes, which generalizes both combinatorial and continuous notions of sparsification.

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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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