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In page Vapnik–Chervonenkis dimension:

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The VC dimension of a model f {\displaystyle f} is the maximum number of points that can be arranged so that f {\displaystyle f} shatters them. More formally, it is the maximum cardinal D {\displaystyle D} such that some data point set of cardinality D {\displaystyle D} can be shattered by f {\displaystyle f} .