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On the Complexity of Sampling Redistricting Plans

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arxiv 2206.04883 v2 pith:H7ZURZNW submitted 2022-06-10 cs.DS cs.CG

classification cs.DScs.CG
keywords redistrictingplanssamplesamplingalternativebalanceblockscensus
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abstract

A crucial task in the political redistricting problem is to sample redistricting plans i.e. a partitioning of the graph of census blocks into districts. We show that Recombination [DeFord-Duchin-Solomon'21]-a popular Markov chain to sample redistricting plans-is exponentially slow mixing on simple subgraph of $\mathbb{Z}_2.$ We show an alternative way to sample balance, compact and contiguous redistricting plans using a "relaxed" version of ReCom and rejection sampling.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Census Dual Graphs: Properties and Random Graph Models

    cs.DM 2026-04 unverdicted novelty 7.0 of 10

    Census dual graphs are characterized as nearly planar and nearly triangulated, with perturbed-grid and Delaunay-based random models providing the closest matches among those tested.

  2. Sampling Tree-Weighted Partitions Without Sampling Trees

    cs.DS 2025-08 unverdicted novelty 7.0 of 10

    A new algorithm samples balanced tree-weighted bipartitions directly on planar graphs in expected O(n) time, bypassing spanning tree sampling and speeding up redistricting analysis.

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