Hexagonal tortoise problem: Difference between revisions

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The '''hexagonal tortoise problem''' ({{lang-ko|지수귀문도}}, {{lang-zh|地數龜文圖}}, a.k.a. '''jisuguimundo''') was invented by Korean aristocrat and mathematician Seok-jeong Choi, who lived from 1646 to 1715. It is a mathematical problem that involves a hexagonal lattice, like the hexagonal pattern on some tortoises' shells, to the (''N'') [[vertexVertex (geometry)|vertices]] of which must be assigned integers (from 1 to ''N'') in such a way that the sum of all integers at the vertices of each hexagon is the same.{{sfn|Choe|Choi|Moon|2003|p=850}} The problem has apparent similarities to a [[magic square]] although it is a vertex-magic format rather than an edge-magic form or the more typical rows-of-cells form.{{sfn|Choe|Choi|Moon|2003|pp=850}}

== References ==