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A Tight Bound for EMAC - CWI

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Collisions. Suppose a structure graph G = GM π ∈G(M) is exposed edge by<br />

edge (i.e. in step i the value [i]G is shown to us). We say that G has a collision<br />

in step i if the edge exposed in step i points to a vertex which is already in the<br />

graph. With Col(G) we denote all collisions, i.e. all pairs (i, j) whereinstepi<br />

there was a collision which hit the vertex computed in step j

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