We prove the intermediate claim Li6: OSNo i6.
An exact proof term for the current goal is OSNo_Octonion_i6.
We prove the intermediate claim Li1: OSNo i1.
An exact proof term for the current goal is OSNo_Complex_i.
We prove the intermediate claim Li5: OSNo i5.
An exact proof term for the current goal is OSNo_Octonion_i5.
We prove the intermediate claim Li1i6: OSNo (i1 ⨯ i6).
An exact proof term for the current goal is OSNo_mul_OSNo i1 i6 ?? ??.
Apply OSNo_proj0proj1_split (i1 ⨯ i6) (:-: i5) ?? (OSNo_minus_OSNo i5 ??) to the current goal.
rewrite the current goal using minus_OSNo_proj0 i5 ?? (from left to right).
rewrite the current goal using OSNo_p0_i5 (from left to right).
rewrite the current goal using mul_OSNo_proj0 i1 i6 ?? ?? (from left to right).
rewrite the current goal using OSNo_p0_i6 (from left to right).
rewrite the current goal using OSNo_p1_i6 (from left to right).
rewrite the current goal using OSNo_p0_i (from left to right).
rewrite the current goal using OSNo_p1_i (from left to right).
We will prove i * 0 + - ((- j) ' * 0) = - 0.
rewrite the current goal using mul_HSNo_0R i HSNo_Complex_i (from left to right).
rewrite the current goal using mul_HSNo_0R ((- j) ') (HSNo_conj_HSNo (- j) (HSNo_minus_HSNo j HSNo_Quaternion_j)) (from left to right).
rewrite the current goal using minus_HSNo_0 (from left to right).
An exact proof term for the current goal is add_HSNo_0L 0 HSNo_0.
rewrite the current goal using minus_OSNo_proj1 i5 ?? (from left to right).
rewrite the current goal using OSNo_p1_i5 (from left to right).
rewrite the current goal using mul_OSNo_proj1 i1 i6 ?? ?? (from left to right).
rewrite the current goal using OSNo_p0_i6 (from left to right).
rewrite the current goal using OSNo_p1_i6 (from left to right).
rewrite the current goal using OSNo_p0_i (from left to right).
rewrite the current goal using OSNo_p1_i (from left to right).
We will prove (- j) * i + 0 * 0 ' = - (- k).
rewrite the current goal using conj_HSNo_id_SNo 0 SNo_0 (from left to right).
rewrite the current goal using mul_HSNo_0L 0 HSNo_0 (from left to right).
rewrite the current goal using minus_mul_HSNo_distrL j i HSNo_Quaternion_j HSNo_Complex_i (from left to right).
rewrite the current goal using Quaternion_j_i (from left to right).
rewrite the current goal using minus_HSNo_invol k HSNo_Quaternion_k (from left to right).
We will prove k + 0 = k.
An exact proof term for the current goal is add_HSNo_0R k HSNo_Quaternion_k.
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