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#2 Re: Help Me ! » Strange Sequence » Today 10:15:32

bob bundy wrote:
Stefy wrote:

Can you prove that statement?

You just extrapolated. It doesn't prove that it must be that formula.

EDIT: Found this:http://www.jstor.org/stable/2322314?seq … b_contents

#3 Re: Help Me ! » difference of zero, circle and alphabet O » Today 00:02:57

Agnishom wrote:

According to your definition, the zero sphere is in R.

I'd rather have the zero sphere to be the trivial sphere {0} in {0} and 1-sphere in R.

Well, I guess you'll have to readjust to this definition. It makes more sense when you look at it this way: The 1-sphere is a curved line with only 1 "dimension". The 2-sphere is a surface with 2 "dimensions".

#4 Re: Help Me ! » Strange Sequence » Yesterday 23:58:35

bob bundy wrote:

Let

All sequences must have this form.

Can you prove that statement?

#5 Re: Help Me ! » Strange Sequence » Yesterday 19:19:36

Well, I think so. I think there are more, but these are all just for B=1.

#6 Re: Help Me ! » Strange Sequence » Yesterday 13:11:15

Any positive real number will do.

#7 Re: Help Me ! » difference of zero, circle and alphabet O » Yesterday 12:42:11

But if the 0-sphere is in a space of dimension 1, then shouldn't an n-sphere be in a space of dimension n+1?

#8 Re: Help Me ! » difference of zero, circle and alphabet O » Yesterday 07:48:05

bob bundy wrote:

That's a mighty fine geogebra demonstration Agnishom.  I am well impressed!

Stefy wrote:

An n-sphere is the set of all points in n+1 dimensional space

So a 1-sphere is in 2-D space.  smile

Bob

Yes.

#9 Re: Help Me ! » difference of zero, circle and alphabet O » Yesterday 05:09:03

Because there are no non-trivial circles in the trivial space {0}.

#10 Re: Help Me ! » difference of zero, circle and alphabet O » Yesterday 04:50:16

I don't think there exists a notion of an n-point.

An n-sphere is the set of all points in n+1 dimensional space with a defined measure for which the distance from 0 is equal.

#12 Re: Help Me ! » difference of zero, circle and alphabet O » 2014-12-15 11:59:38

Sorry, confused it with the nomenclature 1-circle.

Also, if looked at as a vector space with the operation being multiplication, it really is a 1-dimensional space.

#13 Re: Help Me ! » difference of zero, circle and alphabet O » 2014-12-15 10:43:39

bob bundy wrote:

Sorry to be picky, but a soft rubber ball is 3 dimensional and his shapes are 2-D.  Have you got a 2-D soft rubber ball by any chance ?

Bob

Sorry to be picky, but his shapes are 1-D smile

#14 Re: Maths Teaching Resources » Great Math apps. » 2014-12-15 01:47:11

DeanPemberton wrote:

Math is a subject that is totally based on formulas there are thousands of formulas used in maths, it is not possible to remember all of those formulas you can take help from some apps like Math formulas and Physics formulas.

I don't exactly agree with that. I think it's more about ideas than exact formulas.

#15 Re: Help Me ! » difference of zero, circle and alphabet O » 2014-12-15 01:40:47

bob bundy wrote:

'cardinality' is fine, but I think it limits you to {counting numbers}.  Number theory is for {reals}

But either definition is good.  Can you prove that each implies the other ?

Bob

You can construct it both ways and it would be the same (up to an isomorphism smile).

Also, zero isn't defined as the cardinality of {}. It's defined as the empty set itself.

#16 Re: Euler Avenue » Dvorak » 2014-12-12 15:17:46

Well, this guys name is August. smile

#17 Re: Help Me ! » help me please and fast » 2014-12-09 07:17:32

I think it needs to satisfy both.

#18 Re: Euler Avenue » Teach Chris » 2014-12-08 03:23:23

Agnishom wrote:
anonimnystefy wrote:

It's a circle, but the inside is not fully collored.

What is the point?

point
n.
1. A sharp or tapered end: the point of a knife; the point of the antenna; EDIT: the point of the head.

Is this what you mean?

#19 Re: Euler Avenue » Teach Chris » 2014-12-08 03:20:38

bobbym wrote:

One by one? So that is where I have been going wrong.

Not literally. Maybe a phrase would be inside out.

#20 Re: Euler Avenue » Teach Chris » 2014-12-08 03:15:26

Commands are actually not that hard to read, as long as you go one by one and figure out what every bit does.

#21 Re: Euler Avenue » Teach Chris » 2014-12-08 03:12:33

It's a circle, but the inside is not fully collored.

#22 Re: Help Me ! » Differentiation » 2014-12-06 05:32:06

Have you tried using the rules of differentiation?

#23 Re: Euler Avenue » What had you learned today that you found interesting? » 2014-12-05 13:23:51

I've learned that there is a very interesting and somewhat natural measure of graph connectedness which also has some nice algebraic properties.

Also, I'm looking to better myself in the study of non-standard analysis, so I've been learning about that a bit too.

#24 Re: Help Me ! » Irrational roots » 2014-12-05 13:00:50

No problemo. Did you do the other one?

#25 Re: Euler Avenue » What had you learned today that you found interesting? » 2014-12-02 06:41:24

Today I learned that you can very effectively use linear algebra to solve some combinatorics problems.

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