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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 90,444

Correct! So what is the problem?

**In mathematics, you don't understand things. You just get used to them.**

**I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.**

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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,657

Nothing. You asked me to post it. I asked you then if you can post a more complicated one.

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Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
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Nope! You know how to do it. They do not get more complicated than that in books.

**In mathematics, you don't understand things. You just get used to them.**

**I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.**

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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,657

Can't you think of one?

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

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 90,444

That is the prototypical problem for that type that appears in books. It tests your ability to form the generating function. You can do it. There are two things left...

**In mathematics, you don't understand things. You just get used to them.**

**I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.**

**Online**

**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,657

Which two things?

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

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 90,444

1) Getting the coefficient.

2) Knowing when and where to use the GF.

**In mathematics, you don't understand things. You just get used to them.**

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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,657

Okay. The coeff can be found in two ways:

1)Computers. Nothing more to say about that.

2)Partial fractons and expand the GFs you get. Read off the general term from the GF you get when you sum all of those GFs you have after partial fractions.

There is no exact rule for the second one. It is I think mostly intuition,though some problems just look made for GFs and some look exactly opposite of that.

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**bobbym****Administrator**- From: Bumpkinland
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2) There are many other ways. gAr and I have discussed them.

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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
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I know. I am saying that it is mostly intuition (gained by experience of course) that determines wheter ir not GFs should be used.

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**bobbym****Administrator**- From: Bumpkinland
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No one can say. A brilliant guy I know asked whether every combinatoric question could be put into the form of a generating function. He posted that question to the best of the best of the best. He got no reply.

**In mathematics, you don't understand things. You just get used to them.**

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**anonimnystefy****Real Member**- From: The Foundation
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If the answer is yes,then we should be able to find a GF for juan's matrix problem.

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 90,444

Me Pappy wrote:

If is a big word.

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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
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How lucky would I have been to ever have met Pappym.

Mathematics is based on lots of assumptions. We use Euclid's geometry,even though we live on a sphere.

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
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He was the greatest m that ever lived.

As a person he was a lot like you.

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**anonimnystefy****Real Member**- From: The Foundation
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Greater than Grandpappym?

How is he a lot like me as a person?

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
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GrandPappym was little more than a beast posing as a man. Tremendously strong and powerfully built. He used his strength to dominate people.

How is he a lot like me as a person?

He was also rebellious in his youth. Unfocused and impatient, sort of like Luke Skywalker.

**In mathematics, you don't understand things. You just get used to them.**

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**anonimnystefy****Real Member**- From: The Foundation
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Wow,that really does sound like me!

Btw,I think I have over 6000 posts now.

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
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Yes, you do. Congratulations.

**In mathematics, you don't understand things. You just get used to them.**

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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
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Thank you,but it is not the number that counts.

Would you like to propose the next topic if you have nothing more to say about this one?

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
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We had that discussion a long time ago.

Keep the thread open, New stuff will go in.

**In mathematics, you don't understand things. You just get used to them.**

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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
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Yes. We had it twice. I do not remember the conclusions though.

Of course I will keep it open. I wouldn't close this one if (enter a reason here). I was just asking if you would like to post the next topic or should I.

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
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No the discussion I am talking about was before you were a member. I was the lightweight in the group and no one paid any attention to what I said.

**In mathematics, you don't understand things. You just get used to them.**

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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
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Do you know where that discussion is.

And you still haven't told if you want to open the new topic or should I.

Here lies the reader who will never open this book. He is forever dead.

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 90,444

**In mathematics, you don't understand things. You just get used to them.**

**Online**