triperfect
A rocket engine. / (military) A non-guided missile propelled by a rocket engine. / A vehicle propelled by a rocket engine. / A rocket propelled firework; a skyrocket. / (slang) An ace (the playing ...
The ordinal form of the number eleven.
plural of Skwarecki
(mathematics) multiperfect such that σ(n) = 3n
3倍完全数はσ(n) = 3nを満たすと定義され、数論では珍しく興味深い対象である。
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