Re: teminology

On 13 Apr, 11:28, montoma...@xxxxxxxxx wrote:
gius のメッセージ:

Hi, everyone,

In mathematics,
what does it mean for a map defined in a certain set,
say A,
to extend "naturally" to a set B which contains as a proper subset
the set A ?

Regards, Giusy

For example,
A={a,b,b,c}
B={a,b,d,f,c}
A=B iff d=f=c
in this case B is also a proper subset of A

I don't mean so, I was speaking about a map which "extends naturally
from A to B"

.

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