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People/First names and surnames/Exercise
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Let
P
{\displaystyle {}P}
be a set of people and
V
{\displaystyle {}V}
the set of the first names and
N
{\displaystyle {}N}
the set of the surnames of these people. Define natural mappings from
P
{\displaystyle {}P}
to
V
{\displaystyle {}V}
, to
N
{\displaystyle {}N}
and to
V
×
N
{\displaystyle {}V\times N}
and discuss them using the relevant notions for mappings.
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