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| author | Thibaut Horel <thibaut.horel@gmail.com> | 2015-02-06 18:27:55 -0500 |
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| committer | Thibaut Horel <thibaut.horel@gmail.com> | 2015-02-06 18:27:55 -0500 |
| commit | 85d2de4ff3588b8059b2bb45ec9444097b996aa7 (patch) | |
| tree | 06c50a6d889e68a3d7920130a3441bfb4a15d4bf /paper/sections/intro.tex | |
| parent | 8d7b0d99cfadc38a15b0f63d28d0edd024e8c5f0 (diff) | |
| download | cascades-85d2de4ff3588b8059b2bb45ec9444097b996aa7.tar.gz | |
Typos
Diffstat (limited to 'paper/sections/intro.tex')
| -rw-r--r-- | paper/sections/intro.tex | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/paper/sections/intro.tex b/paper/sections/intro.tex index d52da66..39f5089 100644 --- a/paper/sections/intro.tex +++ b/paper/sections/intro.tex @@ -46,7 +46,7 @@ The contributions of this paper are the following: \item we formulate the Graph Inference problem in the context of discrete-time influence cascades as a sparse recovery problem for a specific type of Generalized Linear Model. This formulation notably - encompases the well-studied Independent Cascade Model and Voter Model. + encompasses the well-studied Independent Cascade Model and Voter Model. \item we give an algorithm which recovers the graph's edges using $\O(s\log m)$ cascades. Furthermore, we show that our algorithm is also able to recover the edge weights (the parameters of the influence model), @@ -55,7 +55,7 @@ The contributions of this paper are the following: recover is approximately $s$-sparse by proving guarantees in the \emph{stable recovery} setting. \item we provide an almost tight lower bound of $\Omega(s\log \frac{m}{s})$ - observations. + observations required for sparse recovery. \end{itemize} The organization of the paper is as follows: we conclude the introduction by @@ -69,7 +69,7 @@ Section~\ref{sec:experiments}. \paragraph{Related Work} The study of edge prediction in graphs has been an active field of research for -over a decade \cite{Nowell08} \cite{Leskovec07} \cite{AdarA05}. +over a decade \cite{Nowell08, Leskovec07, AdarA05}. \cite{GomezRodriguez:2010} introduced the {\scshape Netinf} algorithm, which approximates the likelihood of cascades represented as a continuous process. The algorithm was improved in later work \cite{gomezbalduzzi:2011}, but is not @@ -82,7 +82,7 @@ analysis depends on a {\it correlation decay} assumption, which limits the number of new infections at every step. In this setting, they show a lower bound of the number of cascades needed for support recovery with constant probability of the order $\Omega(s \log (m/s))$. They also suggest a {\scshape -Greedy} algorithm, which achieves an ${\cal O}(s \log m)$ guarantee in the case +Greedy} algorithm, which achieves a ${\cal O}(s \log m)$ guarantee in the case of tree graphs. The work of \cite{Abrahao:13} studies the same continuous-model framework as \cite{GomezRodriguez:2010} and obtains an ${\cal O}(s^9 \log^2 s \log m)$ support recovery algorithm, without the \emph{correlation decay} assumption. @@ -99,7 +99,7 @@ m)$, by exploiting similar properties of the convex program's KKT conditions. In contrast, our work studies discrete-time diffusion processes including the Independent Cascade model under weaker assumptions. Furthermore, we analyze both the recovery of the graph's edges and the estimation of the model's -parameters, and achieve closer to optimal bounds. +parameters, and achieve close to optimal bounds. \begin{comment} Their work has the merit of studying a generalization of the discrete-time independent cascade model to continuous functions. Similarly to \cite{Abrahao:13}, they place themselves in |
