Some Algebra of Dimensions Exercises

Dimension of Products, Exercise 2 Answer

We select cubes of side lengths 1/2, 1/4, 1/8, ... , 1/2n, ... noting the scaling of the gasket.
Each square covering part of the gasket is the top face of cube covering part of the product.
For cubes of side length 1/2n, each cube covering part of the top face gasket is the top of a column of 2n cubes covering the product.
Because we need 3n squares of side 1/2n to cover the gasket, we need 3n⋅2n cubes of side length 1/2n to cover the product. That is,
N(1/2n) = 3n⋅2n
 
Knowing N(1/2n) we can compute the box-counting dimension:
d = limn→∞Log(N(1/2n)) / Log(1/(1/2n))
= limn→∞Log(3n⋅2n) / Log(2n)
= limn→∞( Log(3n) / Log(2n) + Log(2n) / Log(2n) )
= (Log(3) / Log(2)) + 1

Return to Dimension Algebra Exercises.