「sac number」の夏がやってくる
sac numberについて押さえておくべき3つのこと
Geometric Magic SquaresA Challenging New Twist Using Colored Shapes Instead of Numbers【電子書籍】[ Lee C.F. Sallows ]
<p>Traditional magic squares are squares of numbers in which the rows, columns, and diagonals all add up to the same total. With a voluminous literature going back some 2,500 years, the universal assumption has ever been that magic squares are inherently arithmetical objects. In this innovative work by a British engineer, the author initiates a Copernican revolution in our understanding by replacing numbers with two-dimensional forms. The result is not merely a novel kind of geometrical magic square but a revelation that traditional magic squares are now better seen as the one-dimensional instance of this self-same <em>geometrical</em> activity.</p>画面が切り替わりますので、しばらくお待ち下さい。
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