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Robustness of Colossal Patterns

  • Core Patterns
    Intuitively, for a frequent pattern α, a subpattern β is a τ-core pattern of α if β shares a similar support set with α, i.e., 

\[ \frac{|D_{\alpha }|}{|D_{\beta }|}\geq \tau, 0< \tau \leq 1 \]

where τ is called the core ratio

  • Robustness of Colossal Patterns
    A colossal pattern is robust in the sense that it tends to have much more core patterns than small patterns

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