Homework Statement
Where
:- ∆0 = ∆ is the original triangle ABC.
:- DEF are the midpoints of AB, BC, AC respectively.
:- f1, f2, f3 map the triangular region ABC to the triangular region ADF, DBE and FEC respectively.
:- ∆n+1 = f1(∆n) ∪ f2(∆n) ∪ f3(∆n) for n≥0.
(these are just definitions of...