Theory Update 107

Recall that triality takes three $2 \times 2$ magic factors, depending on three parameters $(a,b,c)$, to form a $3 \times 3$ circulant sum. One obtains circulants when $x^2 = -1$ and when $x^2 = 1$, so we can use magic forms for the $B_3$ circulants. For $x^2 = 1$ we obtain