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Nonisomorphic Verdier octahedra on the same base

Matthias Künzer

We show by an example that in a Verdier triangulated \mbox{category}, there may exist two mutually nonisomorphic Verdier octahedra containing the same commutative triangle.

Journal of Homotopy and Related Structures, Vol. 4(2009), No. 1, pp. 7-38