Reingold: undirected connectivity in logarithmic space

What changed

Proved undirected st-connectivity in deterministic logarithmic space.

Scientific scope

The record is the sole-author 2008 Journal of the ACM article. The 2005 conference version, randomized log-space algorithms, directed reachability and later graph-canonization results remain separate.

Evidence

The linked sources identify this contribution and its scope. WRS has not independently reconstructed the scientific claims. The record is the sole-author 2008 Journal of the ACM article. The 2005 conference version, randomized log-space algorithms, directed reachability and later graph-canonization results remain separate.

Contributors

• Omer Reingold · SCIENCE: Named source author of the scoped work; individual effort shares are not measured.

• JACM DOI record for undirected connectivity in log-space
• ACM SIGLOG bibliography for Reingold connectivity paper

Provisional WRS assessment, edition 2026-10-16.1. Independent expert calibration is pending. This grade does not certify correctness or assign ownership.

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