An interesting mathematical property

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Discussion Overview

The discussion revolves around a mathematical property related to the expression of numbers as sums of differences, specifically focusing on the example of 3^3. Participants explore whether this property has connections to game theory and clarify the nature of the property itself.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant presents an equation involving 3^3 and claims it demonstrates an interesting mathematical property.
  • Another participant questions the relevance of the property to game theory.
  • Some participants identify the property as a "collapsing sum," but express uncertainty about its definition and relevance.
  • One participant suggests that the property may relate to a telescoping series, providing a link to additional information.
  • There is a general acknowledgment that the property can express any number as a sum of differences between smaller numbers.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the connection to game theory, and there is uncertainty regarding the definition and significance of the "collapsing sum." Multiple interpretations of the mathematical property are presented.

Contextual Notes

Some participants express confusion about the terminology used, such as "collapsing sum" and "telescoping series," indicating a lack of clarity in definitions and concepts discussed.

jaquecusto
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3^3 = [3^3 - 3^2] +[3^2 - 3^1] + [3^1 - 3^0] + 3^0

Practical Demonstration:

27 = [27-9] + [9-3] + [3-1] + 1

27 = 18 +6+2+1

27 = 27

Is this property discussed in theory of games?
 
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I don't understand. What does this have to do with game theory?
 
I'm not sure how this has anything to do with game theory, but what you just found is what's called the collapsing sum.
 
gb7nash said:
I'm not sure how this has anything to do with game theory, but what you just found is what's called the collapsing sum.
What is that, exactly? I'm unclear on what the "interesting property" is. Obviously you can express any number as a sum of differences between a series of smaller numbers. I tried googling "collapsing sum" but found nothing helpful.
 
pmsrw3 said:
What is that, exactly? I'm unclear on what the "interesting property" is. Obviously you can express any number as a sum of differences between a series of smaller numbers. I tried googling "collapsing sum" but found nothing helpful.

I think he means a telescoping series: http://en.wikipedia.org/wiki/Telescoping_series of which the OP gave a (trivial) example.
 

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