Smallest singular value bound for general deterministic shifts of real Ginibre matrices
Let be an real Ginibre matrix, let be a deterministic matrix, let , and define the Hermitian imaginary part by
Write for the smallest singular value and let denote the trace of . General shifted real Ginibre smallest singular value conjecture. There exist constants such that
The conjecture extends the shifted case to arbitrary deterministic matrices; the source notes that its preceding theorem proves the special case up to a logarithmic correction. The source does not state a resolution beyond this partial result.
References
Primary source
Giorgio Cipolloni, László Erdős and Dominik Schröder, “On the condition number of the shifted real Ginibre ensemble”, arXiv:2105.13719 (2022).
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