Geodesic
The estimate of the Ricci curvature of a weighted tree
Vestnik Moskovskogo universiteta. Matematika, mehanika, no. 3 (2016), pp. 51-53

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An estimate of the coarse Ricci curvature is obtained in the paper for weighed trees with random walk on the vertex set. 
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     author = {O. V. Rubleva},
     title = {The estimate of the {Ricci} curvature of a weighted tree},
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     url = {http://geodesic.mathdoc.fr/item/VMUMM_2016_3_a9/}
}
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O. V. Rubleva. The estimate of the Ricci curvature of a weighted tree. Vestnik Moskovskogo universiteta. Matematika, mehanika, no. 3 (2016), pp. 51-53. http://geodesic.mathdoc.fr/item/VMUMM_2016_3_a9/