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first category [′fərst ′kad·ə‚gȯr·ē]

(mathematics)

A set is of first category if it is a countable union of nowhere dense sets.

A setSis of first category at a pointxif there is a neighborhood ofxwhose intersection withSis of first category.

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Biopotentials and ionic currents
constitution
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meager set
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set of first category

The first category is always the man of the present, the second the man of the future.

Crime And Punishment by Dostoyevsky, Fyodor View in context

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