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In the Graph Inference problem, one seeks to recover the edges of an unknown
graph from the observations of cascades propagating over this graph.
In this paper, we approach this problem from the sparse recovery perspective.
We introduce a general model of cascades, including the voter model and the independent cascade model, for which we provide the first algorithm which recovers the graph's edges with high
probability and ${\cal O}(s\log m)$ measurements where
$s$ is the maximum degree of the graph and $m$ is the number of nodes.
Furthermore, we show that our algorithm also recovers the edge weights (the
parameters of the diffusion process) and is robust in the context of
approximate sparsity. Finally we prove an almost matching lower bound of
$\Omega(s\log\frac{m}{s})$ and validate our approach empirically on synthetic
graphs.
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