Geodesic
A counterexample to Valette's conjecture
Informatics and Automation, Classical and modern mathematics in the wake of Boris Nikolaevich Delone, Tome 275 (2011), pp. 301-303 
A. Voynov. A counterexample to Valette's conjecture. Informatics and Automation, Classical and modern mathematics in the wake of Boris Nikolaevich Delone, Tome 275 (2011), pp. 301-303. http://geodesic.mathdoc.fr/item/TRSPY_2011_275_a19/
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     url = {http://geodesic.mathdoc.fr/item/TRSPY_2011_275_a19/}
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Voir la notice de l'article provenant de la source Math-Net.Ru

We disprove a well-known conjecture of D. Vallete (1978), which states that every $d$-dimensional self-affine convex body is a direct product of a polytope with a convex body of lower dimension. It is shown that there are counterexamples for dimension $d=4$. Additional assumptions under which the conjecture is true are discussed.

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