The subproof is completed by applying OSNo_Quaternion_k.
The subproof is completed by applying OSNo_Complex_i.
The subproof is completed by applying OSNo_Quaternion_j.
Apply OSNo_mul_OSNo with
Complex_i,
Quaternion_k leaving 2 subgoals.
The subproof is completed by applying L1.
The subproof is completed by applying L0.