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Date: 13-1-2022
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Date: 12-1-2022
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Date: 11-1-2022
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The disjoint union of two sets and
is a binary operator that combines all distinct elements of a pair of given sets, while retaining the original set membership as a distinguishing characteristic of the union set. The disjoint union is denoted
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(1) |
where is a Cartesian product. For example, the disjoint union of sets
and
can be computed by finding
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(2) |
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(3) |
so
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(4) |
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(5) |
REFERENCES:
Armstrong, M. A. Basic Topology, rev. ed. New York: Springer-Verlag, 1997.
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