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Table 1 Notations and descriptions

From: Optimized relativity search: node reduction in personalized page rank estimation for large graphs

Notation Description
N Number of nodes in the graph
K Number of nodes after reduction
M Number of iteration for a certain node
V, E Presentation of nodes and edge
{w, u}, U Designated node, Set of u’s
α, (1 − α) Transition, Teleportation probability
r, P′ Probability, contribution vector
q Stochastic matrix
d in , d out Incoming and outgoing edges
A, D, C Adjacency, diagonal, and covariance matrices, respectively
δ Given threshold
є Error parameter
t Iteration number
x Estimated number for random walk
R Reduced space matrix
C Data matrix