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1 paper

math.NT2026

Principal nonsingularity of the Fourier matrices of orders \(70\) and \(143\)

Jian Gu, Liyi Zhou, Yuhu Wang

We give computer-assisted proofs that every principal minor of each of the \(70\times70\) and \(143\times143\) Fourier matrices is nonzero. A lifting theorem of Caragea, Lee, Malik…