AMR-030-0087
Open
L3
If A is an invertible n x n matrix, is there always an n x n submatrix B of [A A] so that perm(B) is nonzero
Category:Combinatorics
Set:AMR Open Problem Lists
Kahn
Problem Statement
Background
UnsolvedMath v1.3 research audit
Research Notes
Open — literature triaged
Suggested difficulty: L3
Source wording reviewed
These notes are machine-generated research aids from a supervised audit, not peer-reviewed mathematical results. Verify citations and arguments before relying on them.
Audit summary
Result
What remains
Full audit trail
Problem and source review
Literature status
Work performed
About Combinatorics: Counting problems, graph theory, discrete structures.
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