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Posts: 243
Registered: 12/6/04
Posted: Dec 6, 1995 11:45 AM
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>In what course is the term "variable"
>given a definite meaning?

Explicitly, it usually isn't; but I believe that abstract algebra and
linear algebra cannot be understood without implicitly seeing variables as

For example, if you are going to think about the vector space of
polynomials, you can't be thinking of "x" solely as a placeholder for a
number -- you're sitting there waiting to find out what "x" *really* is,
when, in that sense, it isn't.

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