Box-Packing Theorem
The number of "prime" boxes is always finite, where a set of boxes is prime if it cannot be built up from one or more given configurations of boxes.
See also
Conway Puzzle, Cuboid, de Bruijn's Theorem, Klarner's Theorem, Slothouber-Graatsma Puzzle
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References
Honsberger, R. Mathematical Gems II. Washington, DC: Math. Assoc. Amer., p. 74, 1976.
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Cite this as:
Weisstein, Eric W. "Box-Packing Theorem." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/Box-PackingTheorem.html