Encyclopedia > Collection

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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, see collecting and collectible.

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

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... ("Rock of the Marne") 3rd Brigade ("Sledgehammer")-- Based at Fort Benning, Georgia[?]. 1st Battalion, 10th Field Artillery 1st Battalion, 15th Infantry 2nd Battalion, ...