Re: [math-fun] max |determinant| for 38x38 circulant sign matrix

circmatrix(-1,1,1,-1,1,1,-1,-1,-1,1,-1,-1,-1,1,-1,1,-1,-1,1,1,-1,-1,-1,-1,1,-1,-1,-1,-1,-1,1,1,1,1,-1,1,-1,1).det 439152787578280613557573779456 On 28-Aug-12 09:51, Warren Smith wrote:

N=38 |det|=4.39152787578415089e+29 circ=-++-++---+---+-+--++----+-----++++-+-+

(For N=38 the computer says grle=-6002933426.61867619 whereas really the Graham-Lehmer number is exactly 0, which shows that a lot of roundoff error has crept in.)

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