Model Theory with Applications to Algebra and Analysis: Fusion of structures of finite Morley rank

Let T1 and T2 be two countable complete theories in disjoint languages, of finite Morley rank, the same Morley degree, with definable Morley rank and degree. Let N be a common multiple of the ranks of T1 and T2. We show that T1 [ T2 has a nice complete expansion of Morley rank N.