The 'X' elementary symbol used to built impossible structures [Le symbole élémentaire 'X' utilisé pour la construction de structures paradoxales].




See the whole set of impossible symbols (alphabetical order):



or again (pattern order):




(CMAP28 WWW site: this page was created on 07/31/2019 and last updated on 08/01/2019 09:56:56 -CEST-)



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Copyright (c) Jean-François Colonna, 2019.
Copyright (c) CMAP (Centre de Mathématiques APpliquées) UMR CNRS 7641 / Ecole Polytechnique, 2019.