sage: y = expand(K.det()); y a*d*e*h - a*d*f*g - b*c*e*h + b*c*f*g sage: simplify(y) -a*d*f*g + a*d*h*e + b*c*f*g - b*c*h*e
To me, these look like the same expressions, just one has variables sorted differently (h < e?) and different term orders. What is the issue?
Nick
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