Wikipedia: Collection

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In mathematics, collection is another term for set, or sometimes for class.

In common usage, a collection is any group of items that has one or more properties in common.
For example, paintings from the same artist, or coins? from Germany before 1900.

In mathematics, collection is another term for set, or sometimes for class.

In common usage, a collection is any group of items that has one or more properties in common. For example, paintings from the same artist, or coins? from Germany before 1900.

In mathematics, collection is another term for set, or sometimes for class.