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==Definitions==
GVSM introduces term to term correlations, which deprecate the pairwise orthogonality assumption. More specifically, they are considered a new space, where each term vector ''t<sub>i</sub>'' was expressed as a linear combination of ''2<sup>n</sup>'' vectors ''m<sub>r</sub>'' where ''r = 1...2<sup>n</sup>''.
For a document ''d<sub>k</sub>'' and a query ''q'' the similarity function now becomes:
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