allow for negative integer matrices as well
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@ -7,7 +7,7 @@ errs = (ValueError, TypeError)
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def genmatrix(rowcol, intmax, dif) :
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# generate a random matrices
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a = sp.randMatrix(rowcol, rowcol, 0, intmax)
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a = sp.randMatrix(rowcol, rowcol, -intmax, intmax)
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# if determinant non-zero, radnom value less than difficulty, set a to its inverse
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if a.det() != 0 and random.random() <= dif :
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a = a.inv()
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