T1,T2:Type, r1:(T1T1Prop), r2:(T2T2Prop).
  T1 = T2
  
  (x,y:T1. r1(x,y)  r2(x,y))
  
  (WellFnd{i}(T1;x,y.r1(x,y))  WellFnd{i}(T2;x,y.r2(x,y)))

1

1. T1 : Type 2. T2 : Type 3. r1 : T1T1Prop 4. r2 : T2T2Prop 5. T1 = T2 6. x,y:T1. r1(x,y)  r2(x,y)   WellFnd{i}(T1;x,y.r1(x,y))  WellFnd{i}(T2;x,y.r2(x,y))

7 steps

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