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Home | 18.013A | Chapter 1 | Section 1.2 |
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To put a set in correspondence with another means to pair off elements of the first set with those of the other one.
For example we can put the set
in correspondence with
by pairing a with
with 2 and
with 3.
There is not a similar correspondence of
with
, although we can form a correspondence of
with a subset of
, for example, with
.
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