Smallest OBDD for directed reachability in a three by four grid
TheoremDB P3726 · algorithms
Inferred from the community field; finer classification has not been reviewed.
Problem statement
Give every eastward and southward edge of the directed grid a Boolean presence variable. Determine the minimum number of nonterminal nodes in a reduced ordered binary decision diagram for the function that reports whether a directed path exists from the northwest vertex to the southeast vertex, minimized over all edge-variable orders.
Lean 4
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Progress & source assessment
Source-reported assessment, retrieved 8 September 2026. Frontier Science has not independently reviewed this status.
Open. No signed Lean verification is attached to this problem or its selected resolution.
- [1]TheoremDB P3726 link
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