Counting Theorem: Creating Squares w/ 8 Equilateral Triangles

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    Counting Theorem
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SUMMARY

The discussion centers on the Counting Theorem applied to squares composed of eight equilateral triangles, focusing on the color combinations of black and white tiles. The user seeks clarification on calculating distinct squares considering rotations and reflections, utilizing the symmetry group D8. The initial calculation of 28 distinct configurations arises from fixing the identity element and accounting for the eight tiles. Further exploration of rotational symmetries, specifically through angles of π, π/2, and 2π/3, is required for a comprehensive understanding.

PREREQUISITES
  • Understanding of the Counting Theorem in combinatorial mathematics
  • Familiarity with symmetry groups, specifically D8
  • Basic knowledge of rotational and reflective symmetries
  • Ability to visualize and manipulate geometric shapes, particularly squares and triangles
NEXT STEPS
  • Study the application of Burnside's Lemma in counting distinct configurations
  • Learn about the properties and applications of the D8 symmetry group
  • Explore examples of combinatorial problems involving colorings of geometric shapes
  • Investigate advanced topics in group theory related to symmetry and combinatorial enumeration
USEFUL FOR

Mathematicians, educators, and students interested in combinatorial geometry, symmetry analysis, and the application of the Counting Theorem in practical scenarios.

rohan03
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I recently came across this theorem for the first time and read lot of theory however I am really confused with all the examples - specially 3d objects. So I decided to pick up simpler version. I have attached the diagram

If a square is made up of eight equilateral triangles - using black and white colour how many different such squares can be made and each trigaular tiles can be balck or white. Also if two squares are regarded as the same when a rotation or reflection takes one to the other.

Now I understand that you count fix G - so here group is D8 acting on the square ( Hope my understanding is right)

So you get first FIx G as e or identity and 8 tiles two colours so that gives 28

I know you count rotation through ∏ , ∏/2 and 2∏/3

but this is where my understanding stops. If someone can explain to me this i will appreciate it.
I tried just four quardrant and I understood that by colouring it but I can't get my head around anything slightly complicated such as this.
 
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Hey rohan03.

You said you attached the diagram, but it isn't coming up for me. Do you have a link to the diagram?
 
Don't know what happened. Will reattached once have an access to my pc
 

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