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Published online by Cambridge University Press: 20 January 2009
where (Am m) represents a square of m rows and m columns of a's; (Bm r) represents a rectangle of m rows and r columns of b's; (Cr m) represents a rectangle of r rows and m columns of c's;, and (Orr) represents a square of r rows and r columns of zeros.
Crellt's Journal, 72 pp. 152–175.
† Philosophical Magazine (4), i, pp. 295–305,Google Scholar