Partitioning Generating Functions

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SUMMARY

The discussion centers on finding a generating function for distributing r identical objects into 3 indistinguishable boxes. The initial approach involves using the generating function for distinct boxes, represented as (1 + x + x^2 + x^3 +...)^3. However, the challenge arises from the indistinguishability of the boxes, leading to confusion about how to express this in a generating function. The professor indicated that the question may be misplaced in the textbook, suggesting that the necessary material to solve it has not yet been covered.

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  • Understanding of generating functions
  • Knowledge of combinatorial principles, specifically partitions
  • Familiarity with the concept of indistinguishable objects and boxes
  • Basic algebraic manipulation of series
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  • Research generating functions in combinatorics
  • Study the theory of partitions, particularly with indistinguishable objects
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Students studying combinatorics, mathematicians interested in generating functions, and educators seeking to clarify concepts related to partitions and indistinguishable objects.

Shoney45
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Homework Statement



Finda generating function for the number of ways to distribute r identical objects into 3 indistinguishable boxes.

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The Attempt at a Solution



It is the problem of "indistinguishable boxes" that has me flummoxed. I know that if the boxes were distinct, then my generating function would be:

(1 + x + x^2 + x^3 +...)^3

But I am not sure what to do with the matter of "indistinguishable boxes".
 
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The only thing I can come up with is that order doesn't matter in terms of what goes into the boxes. In other words, if I am partitioning the integer 5 into 2,2,1...and I put each of those integers into one each of my three boxes...then 2,2,1 is the same as 1,2,2.

I still can't figure out though how that pans out as an expression in a generating function.
 
We just hit up our professor, and he said the question is misplaced in the book. He said we don't have enough material yet to solve this question. So forget about this question.
 

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