disjoint union

(idea) by tongpoo Sun Jun 24 2001 at 7:10:32
(Mathematics - Set Theory)

The disjoint union of sets is the union of sets which are pairwise disjoint from each other.
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(thing) by ariels Sun Jun 24 2001 at 7:17:06
Commonly denoted by putting a dot in the union sign (copyright Sun microsystems?), or flipping the product sign ∏; this is the coproduct symbol, ࢢ.
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