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 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 Li6i5: OSNo (i6 ⨯ i5).
An exact proof term for the current goal is OSNo_mul_OSNo i6 i5 ?? ??.
Apply OSNo_proj0proj1_split (i6 ⨯ i5) (:-: i1) ?? (OSNo_minus_OSNo i1 ??) to the current goal.
rewrite the current goal using minus_OSNo_proj0 i1 ?? (from left to right).
rewrite the current goal using OSNo_p0_i (from left to right).
rewrite the current goal using mul_OSNo_proj0 i6 i5 ?? ?? (from left to right).
rewrite the current goal using OSNo_p0_i5 (from left to right).
rewrite the current goal using OSNo_p1_i5 (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).
We will prove 0 * 0 + - ((- k) ' * (- j)) = - i.
rewrite the current goal using mul_HSNo_0L 0 HSNo_0 (from left to right).
rewrite the current goal using conj_minus_HSNo k HSNo_Quaternion_k (from left to right).
rewrite the current goal using conj_HSNo_k (from left to right).
rewrite the current goal using minus_HSNo_invol k HSNo_Quaternion_k (from left to right).
We will prove 0 + - (k * (- j)) = - i.
rewrite the current goal using minus_mul_HSNo_distrR k j HSNo_Quaternion_k HSNo_Quaternion_j (from left to right).
rewrite the current goal using Quaternion_k_j (from left to right).
rewrite the current goal using minus_HSNo_invol i HSNo_Complex_i (from left to right).
An exact proof term for the current goal is add_HSNo_0L (- i) (HSNo_minus_HSNo i HSNo_Complex_i).
rewrite the current goal using minus_OSNo_proj1 i1 ?? (from left to right).
rewrite the current goal using OSNo_p1_i (from left to right).
rewrite the current goal using mul_OSNo_proj1 i6 i5 ?? ?? (from left to right).
rewrite the current goal using OSNo_p0_i5 (from left to right).
rewrite the current goal using OSNo_p1_i5 (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).
We will prove (- k) * 0 + (- j) * 0 ' = - 0.
rewrite the current goal using conj_HSNo_id_SNo 0 SNo_0 (from left to right).
rewrite the current goal using minus_HSNo_0 (from left to right).
rewrite the current goal using mul_HSNo_0R (- k) (HSNo_minus_HSNo k HSNo_Quaternion_k) (from left to right).
rewrite the current goal using mul_HSNo_0R (- j) (HSNo_minus_HSNo j HSNo_Quaternion_j) (from left to right).
An exact proof term for the current goal is add_HSNo_0L 0 HSNo_0.
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