How do I set up difference equations for intersecting ovals?

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Discussion Overview

The discussion revolves around setting up difference equations for determining how many regions n simple ovals divide the plane into, under the condition that each oval intersects every other oval at two points and no point is shared by more than two ovals. The scope includes theoretical exploration of difference equations and combinatorial geometry.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant expresses uncertainty about the appropriateness of the section for their question regarding difference equations and ovals.
  • Another participant questions whether the initial question is complete and asks for additional context on the work done related to the topic.
  • A different participant proposes that the problem may be approached using mathematical induction, suggesting that two ovals create four regions and three ovals create nine regions, speculating that the relationship might be quadratic.
  • One participant seeks guidance on the steps necessary to set up the difference equations, indicating they have learned how to solve them but not how to formulate them.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the completeness of the initial question or the specific steps needed to set up the difference equations. Multiple viewpoints and approaches are presented without resolution.

Contextual Notes

There are limitations regarding the assumptions made about the intersections of the ovals and the lack of clarity on the full scope of the problem, which may affect the formulation of the difference equations.

morry
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Ok, I am not sure if this is the right section, but seeing that difference equations are the discrete version...

Now the question is :
Into how many regions do n simple ovals divide the plane, given that every oval meets every other oval in two points and no point in the plane is common to more than two ovals.

I have NO idea how to go about this. Anyone care to shed some light?
 
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Any ideas at all? Is this the right section?
 
Are you sure this is the full question and doesn't have any other parts? What sort of work have you been doing recently on this topic? I'm just trying to get some context because the question doesn't seem very full.
 
Looks to me like an induction question. Two ovals, meeting in two points, divide the plane into 4 regions. 3 ovals, each meeting each other in two points, divide the plane into 9 regions. Hmm, should we guess n2? I suspect you can find a difference equation relating the value for n ovals with the value for n+1 ovals.
 
Thanks for the replies guys. :D

Halls, what would be some of the steps involved in setting up these types of equations? We have covered how to solve them, but not how to set them up. Which is what I am having trouble with.
 

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