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

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T.H. Ray

Posts: 1,107
Registered: 12/13/04
Re: Sixth grade math
Posted: Feb 5, 2010 2:11 PM
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MoeBlee wrote

> On Feb 5, 10:50 am, "T.H. Ray" <thray...@aol.com>
> wrote:
>

> > Speaking only for my own characterization, I find
> no
> > conflict between the set theoretic definition and
> > mine.

>
> What was your particular characterization again? If
> it's not
> extensional then it's in conflict with the set
> theoretic definition.
>

It's both extensional and intensional--though
incomplete, as I pointed out--to define function as the
transformation of one set of numbers to another. The
property of relation inheres in every function.

> In ordinary mathematics, one may be called to prove
> that something
> (call it 'C') is or is not a function, and the way to
> do that is show
> that C is or is not a relation such that for all x,
> y, z, if <x y> and
> <x z> in C, then y=z. On the other hand, with these
> various informal
> definitions, what even IS the mathematical (and
> compatible with
> classial mathematics, as that is the context of the
> ordinary
> mathematics a sixth-grader will go on to study in
> college) means that
> one would prove that something is or is not a
> function?
>

Sure. See my explanation to Ostap Bender as to why
his description that assigns properties is not a function, absent a relation between sets.

Tom

> MoeBlee


Date Subject Author
1/25/10
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1/28/10
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1/31/10
Read Re: Sixth grade math
ostap_bender_1900@hotmail.com
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2/1/10
Read Re: Sixth grade math
ostap_bender_1900@hotmail.com
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Read Re: Sixth grade math
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2/1/10
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
ostap_bender_1900@hotmail.com
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Read Re: Sixth grade math
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Read Re: Sixth grade math
ostap_bender_1900@hotmail.com
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Read Re: Sixth grade math
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2/4/10
Read Re: Sixth grade math
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2/6/10
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Read Re: Sixth grade math
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2/6/10
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Read Re: Sixth grade math
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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
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2/9/10
Read Re: Sixth grade math
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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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2/9/10
Read Re: Sixth grade math
ostap_bender_1900@hotmail.com
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Read Re: Sixth grade math
ostap_bender_1900@hotmail.com
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Read Re: Sixth grade math
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2/9/10
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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Read Re: Sixth grade math
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Read Re: Sixth grade math
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Read Re: Sixth grade math
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