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Topic: Sixth grade math
Replies: 115   Last Post: Feb 15, 2010 5:36 AM

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Marshall

Posts: 1,936
Registered: 8/9/06
Re: Sixth grade math
Posted: Feb 8, 2010 4:03 PM
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On Feb 8, 11:25 am, "T.H. Ray" <thray...@aol.com> wrote:
> Marshall wrote
>
>
>

> > On Feb 8, 4:15 am, "T.H. Ray" <thray...@aol.com>
> > wrote:

> > > Ostap Bender wrote
>
> > > > BTW, why do you like the term "to transform" so
> > much?
> > > > "To transform"
> > > > means "to change", doesn't it? Do all functions
> > > > actually change their
> > > > domains? I just don't see that as a good

> > metaphor.
>
> > > It isn't a metaphor at all.  It's a property that
> > > inheres in every function.  It's a necessary

> > condition.
> > > The range of values within the domain have to obey
> > > a relation between sets that defines the function.

>
> > This relation, what is it? I would assume it is a set
> > of ordered pairs. The function, what is it? I would
> > assume it is a set of ordered pairs. The same set,
> > even. So what is the distinction?

>
> Answer this:  is every set of ordered pairs a function?
> Why or why not?


No, not every set of ordered pairs is a function.
Only those sets of ordered pairs for which each
"left" element of the set appears appears as a
left element exactly once is a function.

Is that all we're talking about? Single-valued
vs. multi-valued?


Marshall


Date Subject Author
1/25/10
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Read Re: Sixth grade math
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Read Re: Sixth grade math
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2/8/10
Read Re: Sixth grade math
T.H. Ray
2/8/10
Read Re: Sixth grade math
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2/9/10
Read Re: Sixth grade math
T.H. Ray
2/8/10
Read Re: Sixth grade math
ostap_bender_1900@hotmail.com
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Read Re: Sixth grade math
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Read Re: Sixth grade math
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Jack Markan

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