hello all !

polylog · 2006-09-28 15:44:44

I just wanted to say hello to everyone on this great forum.

I've been reading a lot of the old posts looking for interesting problems and enjoying them all.

I hope to learn a lot and also contribute whenever possible. Thank you for your time

Patrick · 2006-09-28 17:19:36

Hello polylog and welcome!

I'm sure you'll be able to learn something here

MathsIsFun · 2006-09-28 18:00:47

Hi polylog, and welcome to the forum. Glad to have you "on board"

justlookingforthemoment · 2006-09-28 21:14:42

Hello. Thanks for joining us!

Jai Ganesh · 2006-09-29 00:28:05

Hi polylog,
A big welcome to the forum
And what a beautiful username you've chosen,
so mathematical!
Yet, as a piece of information, polylog is undefined,
thats because if you repeatedly take the logarithm of a number,
at some stage you reach either zero or a negative number.
Thereafter, logarithm of that number is undefined or meaningless
Anyways, it was a lovely thought to chose this username.

espeon · 2006-09-29 04:15:07

hi polylog also ganesh whats a logarithm?

Devantè · 2006-09-29 04:49:58

Erm...Espeon, you'll learn about that when you're older. If we explained it to you, you probably wouldn't understand. But don't worry, your school will teach you soon.

polylog · 2006-09-29 06:29:55

Thanks to everyone for the nice welcome.

ganesh wrote:

Hi polylog,
Yet, as a piece of information, polylog is undefined,
thats because if you repeatedly take the logarithm of a number,
at some stage you reach either zero or a negative number.
Thereafter, logarithm of that number is undefined or meaningless
Anyways, it was a lovely thought to chose this username.

Actually I can't take any credit for coming up with the name... I just remembered it from an article about "integrals that can and cannot be done" from Wolfram Research, and the Polylogarithm function (PolyLog[n, z]) was one of the special functions that comes up with along with other integrals that have no elementary antiderivatives, like the functions erf(x), the log integral Li(x), and so on.

Here is a good definition: http://mathworld.wolfram.com/Polylogarithm.html

espeon wrote:

hi polylog also ganesh whats a logarithm?

hi espeon, here is a simple introduction to the idea:

Consider multiplying 10 *by itself* twice: 10 x 10 = 100.

Or 3 times: 10 x 10 x 10 = 1000.

Or 4 times: 10 x 10 x 10 x 10 = 10000

Now, try to answer these questions:

"How many times do we multiply 10 by itself to get 100?"

"How many times do we multiply 10 by itself to get 1000?"

"How many times do we multiply 10 by itself to get 100000?"

espeon · 2006-09-29 06:46:39

1.10^2
2.10^3
3.10^5

and also if im going to learn soon i want to show off its funshowing off and if u havent noticed im much smarter than other 12 year olds well actually im 12 and 11 days

polylog · 2006-09-29 07:12:48

espeon wrote:

1.10^2
2.10^3
3.10^5

Right!

You have just calculated some logarithms.

The logarithm is the number of times the number called the *base* has to be multiplied by itself to get a certain number as a result. Or in other words, what power of the base gives a certain number. The base in this case was 10.

the notation is like this ('log' is short for logarithm):

10^2 = 100, so we say log(100) = 2.

10^3 = 1000, so we say log(1000) = 3.

10^5 = 100000, so we say log(10000) = 5.

Try the "log" button on your calculator for numbers like 100000, 10000000, etc.

espeon wrote:

if u havent noticed im much smarter than other 12 year olds

I would say so!

espeon · 2006-09-29 07:26:41

oooooooooooooooooooo i get it now! thanks

polylog · 2006-09-29 15:09:51

Glad to help!

espeon · 2006-09-29 17:56:49

lol ty. also funny joke rod just so you dont get left out

soha · 2006-12-07 22:14:01

welcome

Devantè · 2006-12-08 20:37:27

Polylog hasn't been sighted anywhere recently. I wonder what happened to him? Maybe he's just busy.

soha · 2006-12-24 19:25:26

welcome poly log

Devantè · 2006-12-24 23:04:03

His last post was the 30th of November...

Toast · 2006-12-24 23:25:24

Welcome polylog!

Devantè · 2006-12-25 00:01:57

espeon wrote:

oooooooooooooooooooo i get it now! thanks

But remember that there's a lot more to it than that.

Math Is Fun Forum

#1 2006-09-28 15:44:44

hello all !

#2 2006-09-28 17:19:36

Re: hello all !

#3 2006-09-28 18:00:47

Re: hello all !

#4 2006-09-28 21:14:42

Re: hello all !

#5 2006-09-29 00:28:05

Re: hello all !

#6 2006-09-29 04:15:07

Re: hello all !

#7 2006-09-29 04:49:58

Re: hello all !

#8 2006-09-29 06:29:55

Re: hello all !

#9 2006-09-29 06:46:39

Re: hello all !

#10 2006-09-29 07:12:48

Re: hello all !

#11 2006-09-29 07:26:41

Re: hello all !

#12 2006-09-29 15:09:51

Re: hello all !

#13 2006-09-29 17:56:49

Re: hello all !

#14 2006-12-07 22:14:01

Re: hello all !

#15 2006-12-08 20:37:27

Re: hello all !

#16 2006-12-24 19:25:26

Re: hello all !

#17 2006-12-24 23:04:03

Re: hello all !

#18 2006-12-24 23:25:24

Re: hello all !

#19 2006-12-25 00:01:57

Re: hello all !

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