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## #1 2012-01-21 06:52:05

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,030

### Oh,Oh,Oh,merry analysis!!!

hi guys

i wonder if you can guess what this topic is about from the title.anyway i have recently started looking into this a little,so i'm wondering if you can give a few problems for me to do?

Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

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## #2 2012-01-21 07:01:55

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 108,408

### Re: Oh,Oh,Oh,merry analysis!!!

What kind of analysis?

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #3 2012-01-21 07:03:49

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,030

### Re: Oh,Oh,Oh,merry analysis!!!

well look at the title one more time.it's not spelled Ho,ho,ho as usual,but Oh,Oh,Oh.helpful?

Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

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## #4 2012-01-21 07:05:33

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 108,408

### Re: Oh,Oh,Oh,merry analysis!!!

So then you are trying to do Big Oh, or Landau notation as it is sometimes called?

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #5 2012-01-21 07:07:15

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,030

### Re: Oh,Oh,Oh,merry analysis!!!

Correct!!!

so,can you give me some relatively simpler problems i could do?

Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

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## #6 2012-01-21 07:10:46

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 108,408

### Re: Oh,Oh,Oh,merry analysis!!!

Simplify

f(x)=6x^9+8x^8+11 using Big O notation.

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #7 2012-01-21 07:13:38

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,030

### Re: Oh,Oh,Oh,merry analysis!!!

i'm not sure what's meant by that.do you mean just

f(x)=O(x^9) ?

Last edited by anonimnystefy (2012-01-21 07:13:52)

Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

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## #8 2012-01-21 07:17:38

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 108,408

### Re: Oh,Oh,Oh,merry analysis!!!

Yes, that is correct.

What is the meaning of the Big O notation here:

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #9 2012-01-21 07:19:11

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,030

### Re: Oh,Oh,Oh,merry analysis!!!

hi

well maybe that other terms are of "order" greater or equal to x^4.i saw this ex. on wiki.didn't read it carefully.

EDIT:i just looked at the wiki article.it means that the error of calculating the abs. difference e^x-1-x-x^2/2-x^3/6 is less in value than c*|x^4| for some const. c>0

Last edited by anonimnystefy (2012-01-21 07:36:27)

Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

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## #10 2012-01-21 07:19:31

John E. Franklin
Member
Registered: 2005-08-29
Posts: 3,588

### Re: Oh,Oh,Oh,merry analysis!!!

Big-O is like a sort-of estimation of the maximum or minimum or something near the answer.
Big-O square or Big-O log base 10, etc...

igloo myrtilles fourmis

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## #11 2012-01-21 07:21:20

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 108,408

### Re: Oh,Oh,Oh,merry analysis!!!

well maybe that other terms are of "order" greater or equal to x^4.i saw this ex. on wiki.didn't read it carefully

Not quite.

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #12 2012-01-21 07:23:01

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,030

### Re: Oh,Oh,Oh,merry analysis!!!

hi JEF

i read about that.but i think that the O(log x) does not really need a base specified.

Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

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## #13 2012-01-21 07:24:12

John E. Franklin
Member
Registered: 2005-08-29
Posts: 3,588

### Re: Oh,Oh,Oh,merry analysis!!!

oh yeah, I think you're right, it is a general overview type of statement.

igloo myrtilles fourmis

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## #14 2012-01-21 07:24:58

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,030

### Re: Oh,Oh,Oh,merry analysis!!!

hi JEF

i'm not sure exactly why that is.

hi bobbym

i edited my post.

Last edited by anonimnystefy (2012-01-21 07:25:23)

Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

Offline

## #15 2012-01-21 07:25:38

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 108,408

### Re: Oh,Oh,Oh,merry analysis!!!

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Offline

## #16 2012-01-21 07:26:30

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,030

### Re: Oh,Oh,Oh,merry analysis!!!

look at #14.

Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

Offline

## #17 2012-01-21 07:27:45

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 108,408

### Re: Oh,Oh,Oh,merry analysis!!!

Hmmm, that is not correct.

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #18 2012-01-21 07:29:02

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,030

### Re: Oh,Oh,Oh,merry analysis!!!

how is it not correct.did you see the edit in #9

Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

Offline

## #19 2012-01-21 07:31:02

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 108,408

### Re: Oh,Oh,Oh,merry analysis!!!

Yes, I did. That is what I am talking about.

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #20 2012-01-21 07:33:21

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,030

### Re: Oh,Oh,Oh,merry analysis!!!

what is it then?

Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

Offline

## #21 2012-01-21 07:34:42

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 108,408

### Re: Oh,Oh,Oh,merry analysis!!!

You are copying straight from Wiki and not adapting the ideas it contains to the new problem.

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #22 2012-01-21 07:37:02

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,030

### Re: Oh,Oh,Oh,merry analysis!!!

changed it once more.

Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

Offline

## #23 2012-01-21 07:40:00

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 108,408

### Re: Oh,Oh,Oh,merry analysis!!!

Which is asymptotically greater?

9^n or n!

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #24 2012-01-21 07:44:27

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,030

### Re: Oh,Oh,Oh,merry analysis!!!

hi bobbym

i would say n!

Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

Offline

## #25 2012-01-21 07:45:51

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 108,408

### Re: Oh,Oh,Oh,merry analysis!!!

Correct!

Log(n!) or e^n

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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