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4 Quaternions Quaternions can be multiplied following rules similar to those we follow for complex numbers A fundamental thing to remember is that quaternions product is not commutative. When multiplving two quaternions, keep in mind the following definitions about products between their imaginary coefficients i, j, k: 2 2 ij = k, ji=-k jk = i, kj Consider the following two quaternions: q-1 +3i +3j - 4k. Compute: 1. the product pq 2. the norm of the product p