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Squares of triangular cacti. (English) Zbl 0545.05044
A triangular cactus (briefly t-cactus) is a finite simple connected graph in which each block is a triangle. The authors obtain a forbidden subgraph characterization of t-cacti G for which $$G^ 2$$ is Hamiltonian.
Reviewer: L.Lesniak
##### MSC:
 05C45 Eulerian and Hamiltonian graphs 05C05 Trees
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