弗里米什箱，也称为埃舍尔立方体（Elber）或海泽尔错觉（Pappas 1989，第13页），是一种不可能的图形箱，可以绘制但无法构建。它出现在埃舍尔1958年的石版画《瞭望塔》中（Gardner 1970，Ernst 1987），后来被科克伦（Cochran，1966）以箱子的形式重新绘制/重新发现。
弗里米什箱
另请参阅
不可能图形, 不可能的结合, 彭罗斯三角形使用 Wolfram|Alpha 探索
参考文献
Cochran, C. F. Letter to Scientific American 214, 8, June 1966.Elber, G. "Escher for Real." http://www.cs.technion.ac.il/~gershon/EscherForReal/.Ernst, B. Adventures with Impossible Figures. Stradbroke, England: Tarquin, Cover and p. 7, 1987.Escher, M. C. Belvedere. Lithograph, 1958. http://www.mcescher.com/Gallery/recogn-bmp/LW426.jpg.Fineman, M. The Nature of Visual Illusion. New York: Dover, pp. 120-122, 1996.Gardner, M. "Of Optical Illusions, from Figures that are Undecidable to Hot Dogs that Float." Sci. Amer. 222, 124-127, May 1970.Gardner, M. The Colossal Book of Mathematics: Classic Puzzles, Paradoxes, and Problems. New York: W. W. Norton, pp. 216-217, 2001.Jablan, S. "Are Impossible Figures Possible?" http://members.tripod.com/~modularity/kulpa.htm.Pappas, T. The Joy of Mathematics. San Carlos, CA: Wide World Publ./Tetra, p. 13, 1989.Robinson, J. O. The Psychology of Visual Illusion. New York: Dover, Frontispiece and pp. 176-178, 1998.Seckel, A. The Art of Optical Illusions. Carlton Books, p. 14, 2002.
在 Wolfram|Alpha 中引用
弗里米什箱请引用为
Weisstein, Eric W. "弗里米什箱。" 来自 MathWorld--Wolfram Web 资源。 https://mathworld.net.cn/FreemishCrate.html